chemical reaction Crossword Puzzles

6 grade Semester Exams Bodhi.E.Bartels 2021-12-09

6 grade Semester Exams Bodhi.E.Bartels crossword puzzle

Across

atoms of a specific element.
the transfer of heat from one substance to another through direct contact.
energy energy of moving electrons or electric charges.
a chemical reaction has occurred if any of the following take place:unexpected temperature change,unexpected color change.
a measure of an object's thermal energy.
change the type of change that results in the formation of new chemical substances.
formula a shorthand representation of an element or compound using chemical symbols.
transformation the change in energy from one form into another.
energy energy that travels in waves.

Down

a mixture of gases that surround the Earth.
the number written after an element's symbol in a chemical formula that indicates the number
energy energy locked in the nucleus of an atom.
Reaction a chemical change that occurs when two or more chemical substances combine to form a new substance.
a pure substance that can't be broke down chemically.
Change type
a substance that consists of 2 or more elements,combined in a set ratio.
energy energy stored in the of molecules.
the form of energy associated with the movement of atoms and molecules in a material.

18 Clues: Change type • atoms of a specific element. • energy energy that travels in waves. • a measure of an object's thermal energy. • energy energy stored in the of molecules. • a mixture of gases that surround the Earth. • energy energy locked in the nucleus of an atom. • a pure substance that can't be broke down chemically. • ...

Chemical Reactions 1.3 2023-10-11

Across

indicate the number of molecules present in a chemical equation
A+B-->AB
is the burning of a substance in the presence of oxygen
interaction between molecules that causes a chemical change, converting an existing substance into a new substance
For instance, water is ice in its solid form.
A+BX-->B+AX
can have a corrosive effect
H202(aq) + light ------> H2O(l) + O2(g)
Any substance having a pH between 7 to 14 on the pH scale

Down

indicates the number of atoms of an element in a compound, or the matter state of the compound.
an ionic substance formed when a water molecule combines with a hydrogen ion
In a common chemical reaction, the _________ oxygen and a hydrocarbon (such as oil, gasoline, or wood) produce water, carbon dioxide, and heat.
from one state of matter to another without a change in chemical composition
the substances that are formed during a chemical reaction
AC+BD-->AD+BC

15 Clues: A+B-->AB • A+BX-->B+AX • AC+BD-->AD+BC • can have a corrosive effect • H202(aq) + light ------> H2O(l) + O2(g) • For instance, water is ice in its solid form. • is the burning of a substance in the presence of oxygen • the substances that are formed during a chemical reaction • Any substance having a pH between 7 to 14 on the pH scale • ...

Ricky 2019-06-11

Across

Forms between two nonmetals
Negatively charged ions
a state in which there are no observable changes as time goes by
A carbon-based compound with oxygen
When two compounds appear to exchange ions and form two new ones
They conduct electricity
The numbers in front of the formula
two or more elements combined; a substance having different properties than of the elements used.
When a single compound breaks down into two or more elements
Form between a metal and a nonmetal
A substance that takes part in and undergoes change during a reactProducts
Groups of ions with a charge

Down

The symbolic representation of a chemical reaction in the form of symbols and formula
substance that is formed as the result of a chemical reaction
An equation in which each side is the same number of atoms of each element
Any system closed to all transfers of matter and energy
mass of an atom expressed in atomic mass units (amu); the total number of protons and neutrons in the nucleus
Reacts with a compound and displaces another element from the compound
A solution in which the solvent is water
Two or more substances combine to form a new compound
The symbol that separates the reactants from the products of a chemical reaction is
Energy is divided into smaller orbits
the capacity to do work or to produce change
A force that holds the atoms of a molecule together
A way to indicate the chemicals that involved in the chemical reaction
electrons Electrons located in the outermost energy level
the sub-atomic particle, with a negative charge, that orbits the nucleus of an atom.element
Positively charged ions
Electrons move in definite “orbits”
The symbol(aq) indicates a substance is dissolved in?

30 Clues: Negatively charged ions • Positively charged ions • They conduct electricity • Forms between two nonmetals • Groups of ions with a charge • A carbon-based compound with oxygen • The numbers in front of the formula • Electrons move in definite “orbits” • Form between a metal and a nonmetal • Energy is divided into smaller orbits • A solution in which the solvent is water • ...

The Chemistry of Life 2023-09-12

Across

- A PROCESS THAT TRANSFORMS ONE SET OF COMPOUNDS INTO ANOTHER
- CONSISTS OF 5 CARBON SUGAR, PHOSPHATE, AND NITROGENOUS BASE
- CONSISTS OF AN AMINO AND CARBOXYL GROUP. MONOMER OF PROTEINS
- A SCALE MEASURING THE CONCENTRATION OF HYDROGEN IONS IN A SOLUTION
- THE COMPOUND PRODUCED BY A CHEMICAL REACTION
- A COMPOUND THAT RELEASES HYDROXIDE IONS INTO SOLUTION
- THE REACTANTS OF ENZYME CATALYZED REACTIONS
- WEAK ACIDS OR BASES REACTING WITH STRONG ACIDS OR BASES TO PREVENT SHARP CHANGES IN PH
- A SUBSTANCE THAT DOES THE DISSOLVING
- MIXTURES WITH NONDISSOLVED SUBSTANCES THAT SUSPEND MOMENTARILY
- A SUBSTANCE THAT GETS DISSOLVED
- BIOLOGICAL CATALYST MADE OF PROTEINS
- A LARGE UNIT MADE OF SMALLER REPEATING UNITS
- A COMPOUND THAT RELEASES HYDROGEN IONS INTO SOLUTION
- THE ELEMENT OR COMPOUNDS THAT ENGAGE IN A CHEMICAL REACTANT
- ATTRACTION BETWEEN MOLECULES OF THE SAME SUBSTANCE
- A MIXTURE FORMED WITH DISSOLVED SUBSTANCES

Down

- ATTRACTION BETWEEN MOLECULES OF DIFFERENT SUBSTANCES
- POLYMER MADE OF NUCLEOTIDES RESULTING IN DNA OR RNA
- BOND FORMED WHEN ELECTRONS ARE TRANSFERRED TO ATOMS
- POLYMER CONSISTING OF CARBON, HYDROGEN, OXYGEN, AND NITROGEN (AMINO ACIDS)
- BOND FORMED WHEN ELECTRONS ARE SHARED BETWEEN ATOMS
- MADE MOSTLY OF CARBON AND HYDROGEN, HYDROPHOBIC, (OIL/WAX)
- MADE OF CARBON, HYDROGEN, AND OXYGEN IN A RATIO OF 1:2:1 (SUGAR)
- THE BOND FORMED OF THE ATTRACTION OF OPPOSITE CHARGES FROM HYDROGENS AND OXYGENS
- STRUCTURE FORMED BY ATOMS AND COVALENT BONDS
- SUBSTANCE FORMED BY CHEMICAL COMBINATION OF 2+ ELEMENTS
- THE ENERGY NEEDED TO GET A REACTION STARTED
- A PURE SUBSTANCE CONSITING OF ONE TYPE OF ATOM
- A SUBSTANCE THAT SPEEDS UP A CHEMICAL REACTION
- ATOMS OF THE SAME ELEMENT THAT DIFFER IN NUMBER OF NEUTRONS
- A SINGLE UNIT
- SMALL, NEGATIVELY CHARGED PARTICLE FOUD FAR FROM THE NUCLEUS
- THE CENTER OF THE ATOM (PROTONS AND NEUTRONS)
- THE BASIC UNIT OF MATTER

35 Clues: - A SINGLE UNIT • - THE BASIC UNIT OF MATTER • - A SUBSTANCE THAT GETS DISSOLVED • - A SUBSTANCE THAT DOES THE DISSOLVING • - BIOLOGICAL CATALYST MADE OF PROTEINS • - A MIXTURE FORMED WITH DISSOLVED SUBSTANCES • - THE ENERGY NEEDED TO GET A REACTION STARTED • - THE REACTANTS OF ENZYME CATALYZED REACTIONS • - STRUCTURE FORMED BY ATOMS AND COVALENT BONDS • ...

chemistry 2024-10-10

Across

- Atom or molecule with a net electric charge.
- State of matter with no fixed shape or volume.
- Measure of thermal energy in a substance.
- Lipid that stores energy and provides insulation.
- Sweet carbohydrate used as an energy source.
- Substance with a pH greater than 7.
- Reaction involving the loss of electrons.
- Force applied per unit area in gases or liquids.
- Element essential for DNA and ATP (P).
- State of matter that flows and takes the shape of its container.
- Gas that makes up about 78% of Earth's atmosphere (N).
- Important electrolyte for cellular function (K).
- Gaseous state of a substance that is typically a liquid or solid.
- Reaction involving the gain of electrons.
- Combination of two or more substances without a chemical reaction.
- Lightest element, found in water (H).
- Fundamental element in organic chemistry (C).
- Mineral important for bones and teeth (Ca).

Down

- Smallest unit of a chemical compound.
- Essential liquid for life (H₂O).
- Physical form of matter: solid, liquid, or gas.
- Large biomolecule made of amino acids.
- Main source of energy for living organisms.
- Prefix indicating one billionth; used in nanotechnology.
- Substance formed from two or more elements chemically bonded.
- Disinfectant used in water treatment (Cl).
- Process where substances transform into new products.
- Biological catalyst that speeds up chemical reactions.
- Homogeneous mixture of solute and solvent.
- Element known for its distinct smell in rotten eggs (S).
- State of matter with a fixed shape and volume.
- Alkali metal essential for nerve function (Na).
- Inert gas used in balloons (He).
Dioxide - Gas produced during respiration (CO₂).
- Compound often used in fertilizers (NH₃).
- Substance with a pH less than 7.
- Gas needed for respiration (O₂).
- Mixture where small particles are dispersed but not dissolved.
- Organic compound commonly used in beverages (e.g., ethanol).
- Any substance with a defined composition.

40 Clues: - Essential liquid for life (H₂O). • - Inert gas used in balloons (He). • - Substance with a pH less than 7. • - Gas needed for respiration (O₂). • - Substance with a pH greater than 7. • - Smallest unit of a chemical compound. • - Lightest element, found in water (H). • - Large biomolecule made of amino acids. • - Element essential for DNA and ATP (P). • ...

chemistry 2024-10-10

Across

- Atom or molecule with a net electric charge.
- State of matter with no fixed shape or volume.
- Measure of thermal energy in a substance.
- Lipid that stores energy and provides insulation.
- Sweet carbohydrate used as an energy source.
- Substance with a pH greater than 7.
- Reaction involving the loss of electrons.
- Force applied per unit area in gases or liquids.
- Element essential for DNA and ATP (P).
- State of matter that flows and takes the shape of its container.
- Gas that makes up about 78% of Earth's atmosphere (N).
- Important electrolyte for cellular function (K).
- Gaseous state of a substance that is typically a liquid or solid.
- Reaction involving the gain of electrons.
- Combination of two or more substances without a chemical reaction.
- Lightest element, found in water (H).
- Fundamental element in organic chemistry (C).
- Mineral important for bones and teeth (Ca).

Down

- Smallest unit of a chemical compound.
- Essential liquid for life (H₂O).
- Physical form of matter: solid, liquid, or gas.
- Large biomolecule made of amino acids.
- Main source of energy for living organisms.
- Prefix indicating one billionth; used in nanotechnology.
- Substance formed from two or more elements chemically bonded.
- Disinfectant used in water treatment (Cl).
- Process where substances transform into new products.
- Biological catalyst that speeds up chemical reactions.
- Homogeneous mixture of solute and solvent.
- Element known for its distinct smell in rotten eggs (S).
- State of matter with a fixed shape and volume.
- Alkali metal essential for nerve function (Na).
- Inert gas used in balloons (He).
Dioxide - Gas produced during respiration (CO₂).
- Compound often used in fertilizers (NH₃).
- Substance with a pH less than 7.
- Gas needed for respiration (O₂).
- Mixture where small particles are dispersed but not dissolved.
- Organic compound commonly used in beverages (e.g., ethanol).
- Any substance with a defined composition.

CHEMISTRY CROSSWORD 2025-07-21

Across

Visible, hot gas from burning substances.
A substance with a sour taste and pH less than 7; turns blue litmus red.
A container used in labs to hold liquids.
Fourth state of matter found in stars and lightning
The substance dissolved in a solution.
The mixing of atomic orbitals to form new orbitals for bonding.
Measure of the amount of matter.
The amount of space an object or substance occupies.
A fixed circular path in Bohr’s model where electrons revolve around the nucleus.
A neutral particle found in the nucleus of an atom.
The smallest unit of matter that retains the properties of an element.
A compound formed from an acid and a base.
A reaction involving both oxidation and reduction."
A chemical change producing new substances.
Unequal sharing of electrons in a molecule causes this type of charge separation.
A mixture of two or more metals, or a metal and a non-metal.
A slow chemical reaction between iron, water, and oxygen.

Down

A combination of two or more substances that do not chemically combine.
The process in which a single ligand forms multiple bonds with a central metal ion.
The existence of an element in more than one physical form in the same state (like diamond )
A chemical reaction in which a substance burns in oxygen to release heat.
Atom or molecule with an electric charge.
A molecule made of three oxygen atoms.
A negatively charged particle that moves around the nucleus.
A bond formed by sharing of electrons.
Regions in an atom where there is a high probability of finding electrons.
The chemical decomposition of a substance by passing electric current through it.
"Makes up most of the air we breathe, but we can't use it directly."

28 Clues: Measure of the amount of matter. • The substance dissolved in a solution. • A molecule made of three oxygen atoms. • A bond formed by sharing of electrons. • Visible, hot gas from burning substances. • A container used in labs to hold liquids. • Atom or molecule with an electric charge. • A compound formed from an acid and a base. • ...

Chemistry Wrap Up 2022-12-15

Across

The substance entirely consumer in a chemical reaction?
H2O has ______ molecular geometry.
The dissolving medium in a solution.
n = l and l = 5 are examples of ______ numbers.
What form of notation is this value written in? 2.3 *10^6
Gas production is an indication of a _________ reaction.
How many significant figures are in the solution to 1.3456 - 1.21?
The quantitative description oof the relative amounts of substances involved in a chemical reaction.
Elements within a _____ behave similarly.
A triple bond contains 1 _____ and 2 pi bonds.
What is the correct name for the compound CCl₄?
A substance that forms ions in solution.
In this equation, NH3 acts as the Brønsted-Lowry _____: NH3(aq) + H2O(l) ⇌NH4+ (aq) + OH−(aq).
An atom or electron's lowest energy state.
The term for structures with the same connectivity of atoms but different arrangements of valence electrons.

Down

The property of being slightly repelled by a magnetic field, due to paired electrons in orbitals.
A type of property that doesn’t depend on the amount of matter.
The rule stating 4 electrons fill a valence shell.
Chemical equations must be balanced to reflect the law of _____________ of mass.
the physical state “s” indicates a _________ has formed.
When dipole moments in a compound don't cancel out, the molecule can be described as _____.
Atomic radius _______ down a group.
King Henry ___ Monday Drinking Chocolate Milk
What type of reaction is the following? CxHy + O2 → CO2 + H2O
A _____ formal charge is more stable.
How close measurements are to the true value.
The oxidation number of Mn in KMnO4.
LEO says ___.
Hydrogen tends to make ____ bond(s) in a compound.
The standard unit for expressing macroscopic quantities of elements or compounds.
moles solute/liters of solution

31 Clues: LEO says ___. • moles solute/liters of solution • H2O has ______ molecular geometry. • Atomic radius _______ down a group. • The dissolving medium in a solution. • The oxidation number of Mn in KMnO4. • A _____ formal charge is more stable. • A substance that forms ions in solution. • Elements within a _____ behave similarly. • An atom or electron's lowest energy state. • ...

Physical and Chemical Changes 2018-09-03

Physical and Chemical Changes crossword puzzle

Across

a physical property that does not depend on the amount of matter present
change chemical reaction that takes place when two or more substances interact to form a new substance or substances.
change change that does not alter the chemical properties of a substance.
materials that enter into a chemical reaction.

Down

materials that form as the result of a chemical reaction
physical property that depends on the amount of matter present
chemical change that takes place when two or more substances interact to form new substances with new properties.
occurs when oxygen reacts with some other substance

8 Clues: materials that enter into a chemical reaction. • occurs when oxygen reacts with some other substance • materials that form as the result of a chemical reaction • physical property that depends on the amount of matter present • a physical property that does not depend on the amount of matter present • ...

Atoms Vocabulary 2025-10-09

Across

cycle - A method by which carbon is constantly moved throughout the biosphere.
reaction - A process where a set of substances undergo a chemical change to form a different substance.
A table of the chemical elements arranged by atomic number.
- The ability of a material to be stretched into a long wire.
The central core of an atom containing the protons and neutrons.
A particle within the nucleus of an atom that holds a positive charge.
- A molecule is formed when two or more atoms are joined together by a chemical bond.
- Density is the mass per unit volume of a substance.
- A substance is said to be malleable if it can be pounded into a thin sheet.
A family of elements that makes up column 18 of the periodic table. They are very stable due to their full outer electron shells.
The name for the process when oxygen combines with another element to form a compound.
Salts are chemical compounds that are formed by the reaction of an acid and a base.
- A substance that speeds up the rate of a chemical reaction. The catalyst is not consumed in the reaction.
- A conductor is a material that allows the flow of energy such as heat or electricity.
A homogeneous mixture where one substance called the solute is fully dissolved into another substance called the solvent. For example, a solution is formed when salt dissolves into water to make the solution salt water.
- An alloy is a metallic mixture of two or more elements. Examples of alloys include brass, bronze, and steel.
solution - Any solution where water is the solvent.
A particle in the nucleus of an atom that has no electric charge.
- A combination of two or more substances that are not chemically combined.
burner - A piece of chemistry lab equipment that produces a flame used for lab experiments.
- A particle of an atom that orbits the atom's nucleus and carries a negative charge.

Down

An electron in an atom that can participate in a chemical bond.
earth metals - The alkaline earth metals are the elements in the second column of the periodic table.
bond - Covalent bonding occurs between atoms that share a pair of electrons in order to gain full outer shells.
bond - Ionic bonding is when an electron is traded between atoms in order to have full outer shells.
- An attraction between atoms that forms chemical substances.
- A process used to drive a chemical reaction by using an electrical current. It is often used to separate elements.
The pH measures the activity of the hydrogen ion in substances. If a substance has a pH less than 7 it is said to be acidic. If its pH is greater than 7 then it said to be basic or alkaline.
- A base is a substance with a pH higher than seven. Bases are defined as donating a pair of valence electrons.
- Allotropes are different forms in which the same element can exist. For example, the element carbon can take the form of the allotrope graphite or the allotrope diamond.
- A substance that is a good conductor of heat and electricity. They are generally malleable, ductile, and shiny.
- The process of separating mixtures by boiling a liquid and then recovering the cooled gas.
metals - The alkali metals are the elements in the first column of the periodic table with the exception of hydrogen.
The process that occurs when two or more chemical substances are combined to form another chemical substance.
- Isotopes are atoms from the same element that have different numbers of neutrons.
- The atom is a basic unit of matter and the smallest unit of an element. It consists of a nucleus which is surrounded by a cloud of electrons.
- A chemical compound is a pure substance made up of two or more elements.
- The study of chemical processes as they relate to living organisms.
- An acid is a compound with a pH of less than 7 that forms hydrogen ions when dissolved in water. Acids react when coming into contact with bases and some metals to form salts.
- A pure chemical substance that is made up of one type of atom. Each atom in an element is defined by an atomic number which is the number of protons in the nucleus.
- An atom or molecule which has a negative or positive charge because the number of electrons does not equal the number of protons.

41 Clues: solution - Any solution where water is the solvent. • - Density is the mass per unit volume of a substance. • A table of the chemical elements arranged by atomic number. • - The ability of a material to be stretched into a long wire. • - An attraction between atoms that forms chemical substances. • An electron in an atom that can participate in a chemical bond. • ...

Lesson 4-6 Quiz Review 2024-02-07

Across

The ingredient in gasoline that determines the grade of gasoline you buy at the gas station.
Unit of mass in the metric system.
The charge that the valence electrons "feel" due to the number of protons in the nucleus and the number of electrons in the inner shells of the atom.
A counting unit that tells you how many atoms or molecules you have in a given situation.
A type of chemical reaction in which energy is released to the environment.

Down

Prefix for 1000 in the metric system.
Term used to describe the size (or radius) of an atom.
A type of chemical reaction in which energy is absorbed from the environment.
Unit of energy in the metric system.
The type of electrons that are either shared or transferred in all chemical reactions.
The process in which inner electrons shield outer electrons from the positive charge of the atom's nucleus.
The gas/element that makes up rocket fuel.
The total energy (or heat H) of a system (or chemical reaction).

13 Clues: Unit of mass in the metric system. • Unit of energy in the metric system. • Prefix for 1000 in the metric system. • The gas/element that makes up rocket fuel. • Term used to describe the size (or radius) of an atom. • The total energy (or heat H) of a system (or chemical reaction). • A type of chemical reaction in which energy is released to the environment. • ...

Chemical Reactions - amplify 2023-03-14

Chemical Reactions - amplify crossword puzzle

Across

chemical _______ - letters and numbers showing the types and number of atoms that repeat to make up a substance
something that is made of all the same atoms or groups of atoms
able to cause damage
the temperature at which a substance changes from the liquid phase to the gas phase
a structure formed by repeating groups of atoms linked together in a large
the tiny pieces that all matter—all the stuff in the world—is made of

Down

a starting substance that is part of a chemical reaction
a group of atoms joined together in a particular way
the temperature at which a substance changes from the solid phase to the liquid phase
to change the order or position of something
something that can be observed about a substance, such as color, smell, or boiling point
an ending substance that is made during a chemical reaction
chemical _______ - a process in which atoms rearrange to form new substances

13 Clues: able to cause damage • to change the order or position of something • a group of atoms joined together in a particular way • a starting substance that is part of a chemical reaction • an ending substance that is made during a chemical reaction • something that is made of all the same atoms or groups of atoms • ...

WS stoichiometry definitions 2022-11-29

WS stoichiometry definitions crossword puzzle

Across

A ratio expressed as a fraction that equals 1, used to convert units.
Unit for measuring large amounts of small entities.
Relationship between relative quantities of substances taking part in a reaction/forming a compound.
Equation for a chemical reaction in which the number of atoms for each element and the total charge are the same.
The lowest whole number ratio of ions represented in an ionic compound.
Number of atoms or molecules.

Down

chemical formula showing the simplest ratio of elements in a compound.
A compound in which water molecules are chemically bound to another compound/element.
The relationship between the number of moles of various products and reactants in a chemical reaction.
Basic unit of a chemical element that CANNOT be broken down chemically.
formula giving number of atoms of each elements present in one molecule of a specific compound.
Process involving rearrangement of molecular or ionic structure of a molecule.
Mass of a sample of a compound divided by the amount of substance in moles.
Any atom/group of atoms that have one or more positive or negative electrical charges.

14 Clues: Number of atoms or molecules. • Unit for measuring large amounts of small entities. • A ratio expressed as a fraction that equals 1, used to convert units. • chemical formula showing the simplest ratio of elements in a compound. • Basic unit of a chemical element that CANNOT be broken down chemically. • ...

Chemistry 2021-10-20

Across

- is the name for the element with atomic number 7 and is represented by the symbol N
- atom or molecule which has a different number of protons than electrons
capacity - quantity of heat needed to raise the temperature of a sample by a specified amount
mass - average mass of atoms of an element
- emitted energy in the form of rays, waves, or particles
- a substance that cannot be subdivided using chemical means
- alkaline earth metal with element symbol Be and atomic number 4
table - tabular arrangement of elements by increasing atomic number, ordered according to trends in recurring properties

Down

- noble gas with element symbol Ne and atomic number 10
- loss of electrons by an atom, molecule or ion in a chemical reaction
number - the number of protons in the nucleus of an atom of an element
- any matter or substance that has mass
- Iron is the name for the element with atomic number 26 and is represented by the symbol Fe
- stable negatively charged subatomic particle
replacement reaction - chemical reaction in which two reactants exchange anions/cations to form two new products using the same ions

15 Clues: - any matter or substance that has mass • mass - average mass of atoms of an element • - stable negatively charged subatomic particle • - noble gas with element symbol Ne and atomic number 10 • - emitted energy in the form of rays, waves, or particles • - a substance that cannot be subdivided using chemical means • ...

Warm Up 10/15 2025-10-15

Across

(11x6)+1 = ____
The total force acting on an object after all forces are combined.
when _________forces acting on an object are not equal, causing motion to change.
The substance formed as a result of a chemical reaction.
The ________ of Conservation of Mass, States that mass is not created or destroyed in a chemical reaction.
A force that opposes motion between two surfaces in contact.
The number that indicates how many molecules of a substance are involved in a reaction.
A pure substance made of only one type of atom.
The smallest unit of an element that retains its chemical identity.
The SI unit for measuring force.

Down

when _________forces acting on an object are equal, resulting in no motion change.
The tendency of an object to resist a change in its motion.
A push or pull on an object.
A substance made when two or more elements are chemically combined.
A small number that shows how many atoms of an element are in a molecule.
The amount of matter in an object.
Newton's ___________ States that force equals mass times acceleration (F = ma).
The resistance that one surface or object encounters when moving over another.
The rate of change in an object’s velocity over time.
A combination of two or more substances that keep their own properties.

20 Clues: (11x6)+1 = ____ • A push or pull on an object. • The SI unit for measuring force. • The amount of matter in an object. • A pure substance made of only one type of atom. • The rate of change in an object’s velocity over time. • The substance formed as a result of a chemical reaction. • The tendency of an object to resist a change in its motion. • ...

Chemical Bonds Crossword 2025-05-13

Chemical Bonds Crossword crossword puzzle

Across

Bonds that transfer electrons
Bonds that share electrons
A chemical ____ is a link between atoms in a substance that determines its identity
A rule where atoms look for a complete outer level, so they share electrons to be stable
A ______ change is a change in size, shape, form, or identity
Group of atoms held together with chemical bonds.

Down

A chemical reaction occurs when chemical bonds are ____.
The smallest part of a substance that cannot be broken down chemically
A(n) ________ reaction happens when chemical bonds give off heat
A chemical ____ tells you the amount of electrons and atoms

10 Clues: Bonds that share electrons • Bonds that transfer electrons • Group of atoms held together with chemical bonds. • A chemical reaction occurs when chemical bonds are ____. • A chemical ____ tells you the amount of electrons and atoms • A ______ change is a change in size, shape, form, or identity • A(n) ________ reaction happens when chemical bonds give off heat • ...

Chemistry 2024-10-10

Across

- Atom or molecule with a net electric charge.
- State of matter with no fixed shape or volume.
- Measure of thermal energy in a substance.
- Lipid that stores energy and provides insulation.
- Sweet carbohydrate used as an energy source.
- Substance with a pH greater than 7.
- Reaction involving the loss of electrons.
- Force applied per unit area in gases or liquids.
- Element essential for DNA and ATP (P).
- State of matter that flows and takes the shape of its container.
- Gas that makes up about 78% of Earth's atmosphere (N).
- Important electrolyte for cellular function (K).
- Gaseous state of a substance that is typically a liquid or solid.
- Reaction involving the gain of electrons.
- Combination of two or more substances without a chemical reaction.
- Lightest element, found in water (H).
- Fundamental element in organic chemistry (C).
- Mineral important for bones and teeth (Ca).

Down

- Smallest unit of a chemical compound.
- Essential liquid for life (H₂O).
- Physical form of matter: solid, liquid, or gas.
- Large biomolecule made of amino acids.
- Main source of energy for living organisms.
- Prefix indicating one billionth; used in nanotechnology.
- Substance formed from two or more elements chemically bonded.
- Disinfectant used in water treatment (Cl).
- Process where substances transform into new products.
- Biological catalyst that speeds up chemical reactions.
- Homogeneous mixture of solute and solvent.
- Element known for its distinct smell in rotten eggs (S).
- State of matter with a fixed shape and volume.
- Alkali metal essential for nerve function (Na).
- Inert gas used in balloons (He).
Dioxide - Gas produced during respiration (CO₂).
- Compound often used in fertilizers (NH₃).
- Substance with a pH less than 7.
- Gas needed for respiration (O₂).
- Mixture where small particles are dispersed but not dissolved.
- Organic compound commonly used in beverages (e.g., ethanol).
- Any substance with a defined composition.

Unit 1 Chemistry 2025-01-24

Across

A measure of the average kinetic energy of the particles in a substance
A substance's characteristics that determine how it reacts with other substances
State of matter without fixed shape or volume
A type of reaction that absorbs heat
Substances that are consumed during a chemical reaction
An explanation for some aspect of the natural world that has been well supported
A type of reaction that releases heat
An approach to investigate something using multiple steps
State of matter with fixed molecules
A statement that describes something observable in nature that is true
A possible explanation for something that can be tested
Substances formed when two or more elements chemically bond together
Pure substances consisting of only one type of atom
Anything that has mass and occupies space
Solid that forms when two substances mix
State of matter with volume but no fixed shape
A substance's characteristics that can be observed without changing it's chemical identity

Down

Substances produced as a result of a chemical reaction
A change when only the appearance of a substance is changed
The energy of motion
A factor that can change in an experiment
The capacity to do work or produce heat
A process in which substances are transformed
A curve showing the effect of heating or cooling on a substance
Substances with a direct molecular composition that are produced by or used in a chemical process
The smallest unit of an element, consisting of protons, neutrons, and electrons
The form of energy that flows between substances due to a temperature difference
A type of mixture where components are not uniformly distributed
A type of Mixture where the composition is uniform throughout
The branch of science that studies composition, structure, and properties of substances
The theoretical temperature at which all particle motion stops
A combination of two or more substances that are not chemically bonded

32 Clues: The energy of motion • A type of reaction that absorbs heat • State of matter with fixed molecules • A type of reaction that releases heat • The capacity to do work or produce heat • Solid that forms when two substances mix • A factor that can change in an experiment • Anything that has mass and occupies space • State of matter without fixed shape or volume • ...

choice board #3 2021-01-25

Across

represents chemical reaction
cant be created nor destroyed
arrows on a chemical equation
written or printed below the line

Down

everything is equal
not everything is equal on both sides
what make up a product
placed in front of chemical formula
end of a reaction

9 Clues: end of a reaction • everything is equal • what make up a product • represents chemical reaction • cant be created nor destroyed • arrows on a chemical equation • written or printed below the line • placed in front of chemical formula • not everything is equal on both sides

ENZYMES CONTROL BIOLOGICAL PROCESSES 2021-12-01

ENZYMES CONTROL BIOLOGICAL PROCESSES crossword puzzle

Across

a stomach enzyme with a very low optimum pH
the loss of an enzyme's 3D shape
goes along with the lock, in enzymes
goes along with the key, in enzymes
the part of an enzyme where the reaction occurs
more of these ions lower the pH
a reactant in an enzyme-catalysed reaction
a poison that affects an enzyme in respiration
enzyme that breaks down harmful ions in liver cells
a molecule that can speed up an enzyme-catalysed reaction
molecule produced in an enzyme-catalysed reaction

Down

fat-digesting enzyme - useful in biological washing powders
all of the chemical reactions occurring in the cells
the 'best' value for a factor affecting enzyme activity
starch-digesting enzyme
a compound that reduces the activity of an enzyme
a protein-digesting enzyme
this factor affects an enzyme's activity
a molecule that speeds up a reaction but is not affected itself

19 Clues: starch-digesting enzyme • a protein-digesting enzyme • more of these ions lower the pH • the loss of an enzyme's 3D shape • goes along with the key, in enzymes • goes along with the lock, in enzymes • this factor affects an enzyme's activity • a reactant in an enzyme-catalysed reaction • a stomach enzyme with a very low optimum pH • ...

A Random Find :) 2020-04-19

Across

a substance that takes part in and undergoes change during a reaction
a polygon with at least one interior angle greater than 180°.
the smallest particle of a chemical element that can exist.
a chemical reaction that is accompanied by the absorption of heat,or an organism that generates heat.
the willingness to tolerate the existence of opinions or behavior that you dislikes or disagree with.

Down

hopefulness and confidence
When two Angles add up to 180 degrees.
accompanied by the release of heat.
not having any interior angles greater than 180°.
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

10 Clues: hopefulness and confidence • accompanied by the release of heat. • When two Angles add up to 180 degrees. • not having any interior angles greater than 180°. • the smallest particle of a chemical element that can exist. • a polygon with at least one interior angle greater than 180°. • a substance that takes part in and undergoes change during a reaction • ...

Kinetics Definitions 2025-11-04

Across

Provides an alternative reaction route for a reaction to occur, that requires a lower activation energy
Rate ___________ : Relates the rate of a chemical reaction at a given temperature to the product of the concentrations of reactants.
Method used to calculate the concentration of a specific coloured compound in a solution by measuring the extent to which it absorbs certain wavelengths of light.
The time taken for the initial concentration of the reactants to decrease by half.
___________ catalysts: Catalysts that are in a different phase or state to the species in the reaction.
An organic compound containing a halogen atom attached to an alkyl chain.

Down

___________ catalysts: Catalysts that are in the same phase or state as the species in the reaction.
___________ energy: The minimum energy required for a reaction to occur.
a nucleophilic substitution reaction, where the rate equation involved 2 species.
An electron pair donor.
Rate ___________ : Describes the relationship between the rate of chemical reaction and the concentrations of reagents.
a nucleophilic substitution reaction, where the rate equation involved 1 species.

12 Clues: An electron pair donor. • ___________ energy: The minimum energy required for a reaction to occur. • An organic compound containing a halogen atom attached to an alkyl chain. • a nucleophilic substitution reaction, where the rate equation involved 2 species. • a nucleophilic substitution reaction, where the rate equation involved 1 species. • ...

Chapter 2 2019-01-17

Across

a bond involving the sharing of electrons netween atoms
protein
a group of atoms bonded together
molecules consist of many nucleotides linked in a long chain.
amino acid
a carbohydrate whose molecules consist of a number of sugar molecules bonded together.
also known as Bohr’s atomic model
Adenosine triphosphate
energy that travels by waves or particles
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
antibodies is an example of this
spheroproteins
the energy of a body or a system with respect to the motion of the body or of the particles in the system.
Energy form directly involved in putting the matter into motion.
Lack of carbon; compound.
a measure of the hydorgen ion concentration of a solution
also known as Rutherford atomic model
the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
A number equal to the sum of all the neutrons and the protons in an atom's nucleus.
A bond that forms when electrons are transferred from one atom to another.
the outermost shell of an atom containing the valence electrons.
a substance that accepts hydrogen ions
a lipid containing a phosphate group in its molecule
a lipid
process in which molecules are formed, changed, or broken down.
Composed of 2 or more elements.
particle with a negative charge
Also known as Electron shells
anything that has mass and takes up space
organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, and glucose.
a solution that resists changes in pH when acid or alkali is added to it.
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Basic unit of a chemical element.
electrical charge
A reaction where 2 or more molecules or atoms combine to form a larger and more complex molecule.
acid
another term would be inert energy
a polysaccharide
structure of dna
form the basic structural unit of nucleic acids
a lipid

Down

atomic mass
also known as triglycerides
an example of monosaccharides
Carbon-containing compound.
deoxyribonucleic acid
Positive subatomic particle.
particle with a neutral charge
created in 1869
the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
energy form stored in the bonds of chemicals
a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
a change from one state (solid or liquid or gas) to another without a change in chemical composition
a radioactive isotope.
chemical reaction in which an acid and a base react quantitatively with each other.
A reaction where bonds are broken and combined.
a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances. Creates a new substance.
single sugar
the base
fibrous proteins
letters that represent an element
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
any of a class of sugars whose molecules contain two monosaccharide residues.
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
power
the ionized or ionizable constituents of a living cell, blood, or other organic matter.
A reaction where bonds are broken.
a region on an enzyme that binds to a protein or other substance during a reaction.
one of a class of substances that cannot be separated into simpler substances by chemical means.
a substance that liberates hydrogen ions when in an aqueous solution.
ribonucleic acid
include wax and oil

72 Clues: acid • power • protein • a lipid • a lipid • the base • amino acid • atomic mass • single sugar • spheroproteins • created in 1869 • fibrous proteins • ribonucleic acid • a polysaccharide • structure of dna • electrical charge • include wax and oil • deoxyribonucleic acid • Adenosine triphosphate • a radioactive isotope. • Lack of carbon; compound. • also known as triglycerides • Carbon-containing compound. • ...

Chapter 2 Key Terms 2023-09-24

Across

The building block of matter; the smallest possible particle of an element
Quality of molecules having an uneven distribution of electrical charge, resulting in some regions of a molecule having negative charge while others are positive.
A substance that can produce hydrogen ions (H+) in solution.
change in a substance that results in one or more new substances being formed that have different physical and chemical properties than those of the original substance.
A class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things.
A measurement of the average speed of the particles within a substance.
The attraction of particles in one substance for particles in a different substance.
A covalently bonded compound containing the element carbon.
change in a substance that does not change to identity of the substance.
The process by which one substance, the solute, is broken up into smaller pieces by and distributed within a second substance, the solvent.
A pure substance made of only one kind of atom
An attraction between two atoms as a result of sharing or transferring valence electrons.
The physical things that make up the universe or anything that occupies space and has mass.
The process by which particles in solution are evenly distributed throughout the solvent by Brownian motion.
A class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA.

Down

A class of organic compounds that serve as the building blocks of proteins.
An organic compound comprised of the elements carbon, hydrogen, and oxygen; includes sugars, starch, and cellulose.
The smallest particle of a covalently bonded compound.
A substance that binds to an enzyme and reduces its activity, thus slowing a chemical reaction that the enzyme catalyzes.
The attraction between like particles within polar substances.
A substance that changes the rate of a chemical reaction but is not itself used up or affected by the reaction.
A substance that is present before a chemical reaction and takes part in it, usually shown on the left-hand side of a chemical equation.
Change-
A naturally occurring catalyst, usually a protein.
A pure substance made from two or more elements that are chemically combined.
The ability to do work.
A substance that can produce hydroxide ions (OH-) or accept hydrogen ions (H+) in solution.
The substances formed during a chemical reaction, usually indicated on the right-hand side of the chemical equation.
The tendency of energy to disperse and become less available to do work.
A class of simple organic compounds important in living things as a source of both energy and structure.

30 Clues: Change- • The ability to do work. • A pure substance made of only one kind of atom • A naturally occurring catalyst, usually a protein. • The smallest particle of a covalently bonded compound. • A covalently bonded compound containing the element carbon. • A substance that can produce hydrogen ions (H+) in solution. • ...

Chemistry Vocabularies Game! 2019-10-10

Chemistry Vocabularies Game! crossword puzzle

Across

the total kinetic and potential energy which exists in a system when it is at constant pressure.
the energy existing as a result of an object's position in space, as well as the sum of all the attractive and repulsive forces existing among the particles which make up the object.
an intermediate molecule which occurs when reactants are in the process of rearranging to form products.
a graph showing how the number of particles having a given kinetic energy changes with increasing temperature.
the substances produced by a chemical reaction.
the actual sequence of steps which make up an overall reaction.

Down

a reaction which absorbs heat, so that products have more energy than reactants.
the theory stating that molecules act as small, hard spheres which bounce off each other and transfer energy among themselves during their collisions.
molecules which are produced in one step of a reaction mechanism and subsequently used up in another step.
the slowest step in a reaction mechanism.
the minimum potential energy required to change reactants into an activated complex.
the energy which a system possesses because of movement within the system.
a chemical which can be added to a reaction to increase the rate of the reaction.
the substances being combined in a reaction.

14 Clues: the slowest step in a reaction mechanism. • the substances being combined in a reaction. • the substances produced by a chemical reaction. • the actual sequence of steps which make up an overall reaction. • the energy which a system possesses because of movement within the system. • a reaction which absorbs heat, so that products have more energy than reactants. • ...

food 2018-12-10

Across

pure substance that cannot be broken down into other substances contains one atom
pure substance formed when at least one ,metal and nonmetal combine
Change in the appearance or state of a substance that does not change the composition
ability of a substance to conduct electricity or heat
a material that electricity or heat can move through easily
group 17 elements in the periodic table least reactive metals
Solid, liquid, gas and plasma
Change of state from solid to a liquid
Amount of mass in a given volume of a substance
chemical reaction that absorbs heat
Change of stare from a solid to gas or a gas to a solid
positively charged center of an atom contains protons and nuetrons

Down

A system of easy-to-use warning symbols for hazardous materials
invisible negatively charged particle that orbits the nucleus of an atom
Catalyst involved in chemical reactions in living things
Measure of atomic mass
Change of state from a liquid to a gas
chemical reaction that produces heat
number of protons in the nucleus equal to electrons
Change of state from a gas to a liquid
substance that speeds up chemical reactions
chemical combination of two or more substances in a specific ratio
description of a solid that can be stretched into a long wire
Change of state from a liquid to a solid
slow chemical change that occurs when oxygen in the air reacts with metal

25 Clues: Measure of atomic mass • Solid, liquid, gas and plasma • chemical reaction that absorbs heat • chemical reaction that produces heat • Change of state from a liquid to a gas • Change of state from a gas to a liquid • Change of state from solid to a liquid • Change of state from a liquid to a solid • substance that speeds up chemical reactions • ...

Chapter 3 Vocabulary Worksheet 2023-10-03

Chapter 3 Vocabulary Worksheet crossword puzzle

Across

Energy Energy stored in chemical bonds
The amount of thermal energy in a system at constant pressure which is measured in joules
The release of energy
Energy The minimum energy required to cause a chemical reaction
Energy Converted from Kinetic Energy
Energy Amount of energy that holds chemical bonds together

Down

Energy absorption
The measurement of Kinetic energy
Energy Energy that the body/object posses
The amount of energy transferred between a system and its surroundings
Theory Collision of molecules that collide at the correct orientation, creating a chemical reaction

11 Clues: Energy absorption • The release of energy • The measurement of Kinetic energy • Energy Energy stored in chemical bonds • Energy Converted from Kinetic Energy • Energy Energy that the body/object posses • Energy The minimum energy required to cause a chemical reaction • Energy Amount of energy that holds chemical bonds together • ...

unit 4 vocab for biology 2020-11-13

unit 4 vocab for biology crossword puzzle

Across

relating to, involving, or requiring free oxygen
the breakdown of glucose by enzymes releasing energy and pyruvic acid
is a substance that is present at the end of a chemical reaction
a plasted that contains chlorophyll and in which photosynthesis takes place
a substance produced by a living organism which acts as a catalyst

Down

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
is a green pigment found in plants
a substance that takes part in and undergoes change during a reaction
is an important chemical compound in biochemistry
a simple sugar which is an important energy source in living organisms

10 Clues: is a green pigment found in plants • relating to, involving, or requiring free oxygen • is an important chemical compound in biochemistry • is a substance that is present at the end of a chemical reaction • a substance produced by a living organism which acts as a catalyst • the breakdown of glucose by enzymes releasing energy and pyruvic acid • ...

Module 4 crossword 2021-08-12

Across

when the total chemical energy of the products of a chemical reaction is less than the total chemical energy of the reactants
heat given off when one mole of substance is burnt completely in excess of oxygen
the law of ____ of energy states that energy cannot be created nor destroyed it can only change form
a type of equation that indicates the change in energy in a reaction
speeds up the reaction but isn't consumed itself

Down

in endothermic reactions energy is _____ from the surroundings
Hp < Hr
where energy enters after leaving the system
what type of catalyst lowers the activation energy
the chemical energy of a substance

10 Clues: Hp < Hr • the chemical energy of a substance • where energy enters after leaving the system • speeds up the reaction but isn't consumed itself • what type of catalyst lowers the activation energy • in endothermic reactions energy is _____ from the surroundings • a type of equation that indicates the change in energy in a reaction • ...

All about Organic Chemistry 2026-01-21

All about Organic Chemistry crossword puzzle

Across

breaking alkanes
organic solvent family
many units
high energy family
acid plus alcohol
doubly bonded family

Down

ester reaction
reaction of alkenes
A family/series of similar compounds
same formula different structure
alkane minus hydrogen
many essential oils component
Special group similar chemical properties
polyethene

14 Clues: many units • polyethene • ester reaction • breaking alkanes • acid plus alcohol • high energy family • reaction of alkenes • doubly bonded family • alkane minus hydrogen • organic solvent family • many essential oils component • same formula different structure • A family/series of similar compounds • Special group similar chemical properties

Crossword Puzzle for Chapter 2 2023-09-20

Crossword Puzzle for Chapter 2 crossword puzzle

Across

The attraction between like particles within polar substances
A pure substance made of only one kind of atom
An attraction between two atoms as a result of sharing or transferring valence electrons
A naturally occurring catalyst, usually a protein
A pure substance made from two or more elements that are chemically combined
The physical stuff that makes up the universe, anything that occupies space and has mass
A covalently bonded compound containing the element carbon
The attraction of particles in one substance for particles in a different substance
A class of nonpolar organic compounds that are insoluble in water and are used for energy storage and cell membranes in living things
a change of materials into another, new materials with different properties and one or more than one new substances are formed
The tendency of energy to disperse and become less available to do work
A class of simple organic compounds important in living things as a source of both energy and structure
A substance that is present before a chemical reaction and takes part in it, usually shown on the left-hand side of a chemical equation
A substance that can produce hydroxide ions (OH-) or accept hydrogen ions (H+) in solution

Down

A substance that binds to an enzyme and reduces its activity, thus slowing a chemical reaction that the enzyme catalyzes
The smallest particle of a covalently bonded compound
A class of organic compounds that serve as the building blocks for the information storage molecules DNA and RNA
the process where a solute in gaseous, liquid, or solid phase dissolves in a solvent to form a solutiont
An organic compound comprised of the elements carbon, hydrogen, and oxygen
The substances formed during a chemical reaction, usually indicated on the right side of a chemical equation
the passive movement of molecules or particles from an area of higher concentration to an area of lower concentration
A substance that can produce hydrogen ions (H+) in solution
A class of organic compounds that serve as the building blocks of proteins
A change in a substance that does not change the identity of the substance
Quality of molecules having an uneven distribution of electrical charge, resulting in some regions of the molecule having negative charge while others are positive
The ability to do work
A measurement of the average speed of the particles within a substance
The building block of matter; the smallest possible particle of an element
A substance that changes the rate of a chemical reaction but is not itself used up or affected by the reaction

29 Clues: The ability to do work • A pure substance made of only one kind of atom • A naturally occurring catalyst, usually a protein • The smallest particle of a covalently bonded compound • A covalently bonded compound containing the element carbon • A substance that can produce hydrogen ions (H+) in solution • The attraction between like particles within polar substances • ...

Biochemistry Crossword 2025-09-30

Across

Macromolecules made mostly from Carbon and Hydrogen atoms; includes fats, oils and waxes.
The center of an atom, which contains the protons and neutrons
Small chemical unit that makes up a polymer.
Compounds that produce Hydroxide ions(OH-) in solution.
Macromolecules containing Hydrogen, Oxygen, Nitrogen, Carbon and Phosphorus.
Pure substance that consists entirely of one type of atom.
Material composed of 2 or more elements or compounds that are physically mixed together but not chemically combined.
Type of mixture in which all the components are evenly distributed.
Type of bond between atoms in which the electrons are shared.
Elements or compounds that are produced in a chemical reaction.
Subunit of which nucleic acids are composed; made up of a 5-carbon sugar, phosphate group and a nitrogen base.
Slight attraction that develops between oppositely charged regions of nearby molecules.
Compounds that produce Hydrogen ions(H+) in solution.
One of the several forms of a single element, which contains the same number of protons but a different numbers of neutrons.
Atom that has a positive or negative charge.
Negatively charged particle: located in the space surrounding the nucleus.
Simple sugar molecules.
Force of attraction between molecules of the same substance.
Attraction between molecules of different kinds of molecules.
Energy that is needed to get a reaction started.
Weak attraction between a hydrogen atom and another atom.

Down

Macromolecules that contain carbon, oxygen, nitrogen; needed by the body for growth and repair.
Compounds that prevent sharp, sudden changes in pH.
Reactant of an enzyme-catalyzed reaction.
Scale with values from 0 to 14; used to measure the concentration of H+ ions in a solution.
Substance that is dissolved in a solution.
Process that changes, or transforms, one set of chemicals into another set of chemicals.
Substance that speeds up the rate of a chemical reaction.
Compounds made of Carbon, Hydrogen, Oxygen atoms; type of nutrient that is the major source of energy for the body.
Compound with an amine group on one end and a carboxyl group on the other end.
Basic unit of matter
Mixture of water and nondissolved material.
Elements or compounds that enter into a chemical reaction.
Substance formed by chemical combination of 2 or more elements in definite proportions
Molecules composed of many monomers.
Chemical bonds formed when one or more electrons are transferred from one atom to another.
Smallest unit of most compounds that displays all the properties of that compound.
Dissolving substance in a solution.
Protein catalyst that speeds up the rate of specific biological reactions.

39 Clues: Basic unit of matter • Simple sugar molecules. • Dissolving substance in a solution. • Molecules composed of many monomers. • Reactant of an enzyme-catalyzed reaction. • Substance that is dissolved in a solution. • Mixture of water and nondissolved material. • Small chemical unit that makes up a polymer. • Atom that has a positive or negative charge. • ...

Atoms in Chemical reactions 2023-10-17

Atoms in Chemical reactions crossword puzzle

Across

6 letter word addressed in every class and for students to follow
statement made and then proven using Scientist data
French chemist who discovered Law of Matter
Can only be seen through a microscope
is the ending of a chemical reaction

Down

Law is a verbal or mathematical description of a natural phenomenon.
given to student by teacher when the student does something nice or helpful
shorthand notations that describe chemical reactions
Makes up everything in the world
is the the beginning of a chemical reaction
Chemical formula for water

11 Clues: Chemical formula for water • Makes up everything in the world • is the ending of a chemical reaction • Can only be seen through a microscope • is the the beginning of a chemical reaction • French chemist who discovered Law of Matter • statement made and then proven using Scientist data • shorthand notations that describe chemical reactions • ...

The Chemistry Grid 2025-07-07

Across

What must a collision be to cause a reaction?
What kind of reaction gives off heat to the surroundings?
What do particles need to do in order to react?
what gas is given off when metal reacts with acid?
What gas turns lime water cloudy?
What happens to rate of reaction when temperature is lowered?
What type of energy do particles need to react?
What gas is given off when hydrogen peroxide decomposes?

Down

What kind of reaction absorbs heat from the surroundings?
A ____________________ is used during experiment to allow gas to escape
Which factor affects the number of particle per unit volume?
Particle moves _____________ when temperature increases
What word describes how often reacting particles collide?
Minimum energy that colliding particles must have for reaction to occur
What do you increase when you break a solid into smaller piece?
What unit is commonly used to measure reaction time?
What speeds up a chemical reaction without being used up
Colour of thymolphthalein in alkali solution
What is the most important apparatus to collect gas

19 Clues: What gas turns lime water cloudy? • Colour of thymolphthalein in alkali solution • What must a collision be to cause a reaction? • What do particles need to do in order to react? • What type of energy do particles need to react? • what gas is given off when metal reacts with acid? • What is the most important apparatus to collect gas • ...

Chemical Reactions 2024-04-10

Across

something that is made of all the same atoms or groups of atoms
the relative size of things
a group of atoms joined together in a particular way
letters and numbers showing the types and number of atoms that repeat to make up a substance (2 words)
the tiny pieces that all matter - all the stuff in the world - is made of
able to cause damage
a substance that is added to soil to help plants grow
the temperature at which a substance changes from the liquid phase to gas phase

Down

a process in which atoms rearrange to form new substances (2 words)
an ending substance that is made during a chemical reaction
an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
the temperature at which a substance changes from the solid phase to the liquid phase (2 words)
to change the order or position of something
a starting substance that is part of a chemical reaction
something that can be observed about a substance, such as color, smell, or boiling point

15 Clues: able to cause damage • the relative size of things • to change the order or position of something • a group of atoms joined together in a particular way • a substance that is added to soil to help plants grow • a starting substance that is part of a chemical reaction • an ending substance that is made during a chemical reaction • ...

SCIENCE 2019-03-20

Across

The smallest particle of a chemical element that can exist.
A substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
A substance that flows freely but is of constant volume, having a consistency like that of water or oil.
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
a thing or person that is the result of an action or process.
A thing that is composed of two or more separate elements; a mixture.
a substance that takes part in and undergoes change during a reaction.
A strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
Physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

Down

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
A substance made by mixing other substances together.
Firm and stable in shape; not liquid or fluid.
relating to things perceived through the senses as opposed to the mind; tangible or concrete.
relating to chemistry, or the interactions of substances as studied in chemistry.
Something in side a pencil
A tiny portion of matter.
The spreading of something more widely.
The chemical element of atomic number 13, a light silvery-grey metal.
The chemical element of atomic number 30, a silvery-white metal that is a constituent of brass and is used for coating (galvanizing) iron and steel to protect against corrosion.
The chemical element of atomic number 20, a soft grey metal.

20 Clues: A tiny portion of matter. • Something in side a pencil • The spreading of something more widely. • Firm and stable in shape; not liquid or fluid. • A substance made by mixing other substances together. • The smallest particle of a chemical element that can exist. • The chemical element of atomic number 20, a soft grey metal. • ...

Unit 4: Chemical Reactions 2021-11-13

Unit 4: Chemical Reactions crossword puzzle

Across

One capital/shape type; can not break; atoms same
Change type with substance remaining the same
Liquid plus liquid makes this solid
Change type with new substance being formed
Proportion of number of each atom type
With >1 type of substance that are not attached
Shape or letters (& numbers) to represent matter
Tiny building block has protons, neutrons, electrons
With >1 chemical symbol touching is a chemical...
Periodic Table abbreviation is a chemical...

Down

Type of (color) change in chemical reactions
Physical change (of state) that can go back
Chemical reaction with oxygen to change color
Element types on zig zag line of PTE
Chemical change type that can't go back
With >1 capital/shape type; can break chemically
Element types on left side of Periodic Table
Element types on right side of Periodic Table
State of matter produced if fizzing/bubbling occurs

19 Clues: Liquid plus liquid makes this solid • Element types on zig zag line of PTE • Proportion of number of each atom type • Chemical change type that can't go back • Physical change (of state) that can go back • Change type with new substance being formed • Type of (color) change in chemical reactions • Element types on left side of Periodic Table • ...

Keystone Vocab 2025-10-15

Across

proteins that increases the rate of chemical reactions without being used up
Circular DNA molecules that are separate from chromosomal DNA
single-celled organism; lacks a membrane-bound nucleous
what connects to create a polymer
describes a nonliving factor in an ecosystem

Down

a molecule and a different type of molecule connected
composed of many cells
one or more cells containing membran-bond organells
two types of the same molecule bonded
Chemical reaction where chemical bonds in polymers are broken with water present
A substance that attaches to an enzyme in a chemical reaction
describes a living or once-living organism

12 Clues: composed of many cells • what connects to create a polymer • two types of the same molecule bonded • describes a living or once-living organism • describes a nonliving factor in an ecosystem • one or more cells containing membran-bond organells • a molecule and a different type of molecule connected • single-celled organism; lacks a membrane-bound nucleous • ...

Chemistry class 10 2022-07-14

Across

A reaction involving both oxidation and reduction simultaneously means one reactant gets oxidised, the other gets reduced.
a chemical reaction in which a more reactive element displaces a less reactive element from its compound.
a chemical reaction in which energy is released in the form of light or heat.
a chemical equation in which there are equal numbers of atoms of each element on both sides of the equation
Any substance that increases the rate of a reaction without itself being consumed.

Down

a substance that is formed as the result of a chemical reaction
A reaction in which oxygen atom is added or hydrogen atom is lost.
a reaction in which two reactants combine to form one product.

8 Clues: a reaction in which two reactants combine to form one product. • a substance that is formed as the result of a chemical reaction • A reaction in which oxygen atom is added or hydrogen atom is lost. • a chemical reaction in which energy is released in the form of light or heat. • Any substance that increases the rate of a reaction without itself being consumed. • ...

Chemistry class 10 2022-07-14

Across

A reaction involving both oxidation and reduction simultaneously means one reactant gets oxidised, the other gets reduced.
a chemical reaction in which a more reactive element displaces a less reactive element from its compound.
a chemical reaction in which energy is released in the form of light or heat.
a chemical equation in which there are equal numbers of atoms of each element on both sides of the equation
Any substance that increases the rate of a reaction without itself being consumed.

Down

a substance that is formed as the result of a chemical reaction
A reaction in which oxygen atom is added or hydrogen atom is lost.
a reaction in which two reactants combine to form one product.

HC Unit 7 Vocab 2024-01-17

Across

two atoms that slam together to form a heavier atom
two substances in physical contact with each other exchange no heat energy
amount of energy stored in a bond between atoms in a molecule
quantity of heat required to raise temperature one gram of a substance by one celsius degree
quantities of heat evolved or absorbed during chemical reaction
process in which a gas changes directly to a solid
process of measuring the amount of heat released or absorbed in a chemical reaction

Down

very simplified representation of the valence shell electrons in a molecule
chemical reactions that release energy
total heat content of a system
values which depend on the state of the substance
average kinetic energy of all the atoms or molecules of that substance
process in which a solid changes into a gas
chemical reactions that absorbs thermal energy
device used to measure the amount of heat involved in a chemical or physical process

15 Clues: total heat content of a system • chemical reactions that release energy • process in which a solid changes into a gas • chemical reactions that absorbs thermal energy • values which depend on the state of the substance • process in which a gas changes directly to a solid • two atoms that slam together to form a heavier atom • ...

Law of Conservation of Mass 2024-10-09

Law of Conservation of Mass crossword puzzle

Across

If the reactants add up to five grams, the products must add up to __ grams.
The ___of Conservation of Mass states that all matter is conserved in a reaction.
the things on the right side of the chemical equation
Water breaking down into hydrogen and oxygen is a __ change.
The Law of ___ of Mass states that all atoms in must equal all atoms out.
the things on the left side of the chemical equation
Mass is usually measured in __ or kilograms.

Down

number in front of a chemical formula, like the 2 in 2NaCl
If an equation is ___, the number of atoms on each side is unequal.
the measure of how many atoms are in something
In __ systems, gas could escape.
A __ equation has the same number of atoms on each side.
Water boiling is a ___ change, because it is still H2O.
In __ systems, no atoms can escape from the reaction.
In chemical reactions, ___ break and new ones form between electrons.

15 Clues: In __ systems, gas could escape. • Mass is usually measured in __ or kilograms. • the measure of how many atoms are in something • the things on the left side of the chemical equation • the things on the right side of the chemical equation • In __ systems, no atoms can escape from the reaction. • Water boiling is a ___ change, because it is still H2O. • ...

7.2 Types of Reactions 2022-03-29

Across

A chemical reaction in which two compounds exchange positive ions and form two new compounds
A chemical reaction in which one element takes the place of another element in a compound
A chemical reaction in which electrons are transferred from one reaction to another

Down

A chemical reaction in which two or more substances react to form a single substance
A chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light
A chemical reaction in which a compound breaks down into two or more simpler substances
a substance that undergoes change into products over time

7 Clues: a substance that undergoes change into products over time • A chemical reaction in which electrons are transferred from one reaction to another • A chemical reaction in which two or more substances react to form a single substance • A chemical reaction in which a compound breaks down into two or more simpler substances • ...

Thermochemistry 2023-04-28

Across

form of energy that an object has by reason of its motion
heat is transmitted through a substance when there is a difference n temperature
heat needed to raise the temperature of the unit mass of given substance by amount
substance present at the end of a chemical reaction
accompanied by the release of heat
amount of energy needed to warm 1g H2O by 1*C
energy contained within a system that is responsible for its temperature
energy that comes from a source and travels through space at speed of light

Down

measuring the amount of heat released or absorbed during chemical reaction
requiring the absorption of heat
Quantity of heat necessary to change 1g of solid to liquid without temperature changes
study of heat energy which is associated with chemical reactions changes like melting or boiling
the movement caused within a fluid by the tendency of hotter material to rise
Amount of heat needed to turn 1g of liquid into vapor, without change in temperature
substance that undergoes change during a reaction
movement of tiny atoms, molecules or ions in solids, liquids and gases
unit of energy in the SI Unit system
temperature where 0* is freezing point and 100* is boiling point
SI Unit of thermodynamic temperature

19 Clues: requiring the absorption of heat • accompanied by the release of heat • unit of energy in the SI Unit system • SI Unit of thermodynamic temperature • amount of energy needed to warm 1g H2O by 1*C • substance that undergoes change during a reaction • substance present at the end of a chemical reaction • form of energy that an object has by reason of its motion • ...

Scince vocbulary 2022-02-24

Across

A subatomic particle with a negative charge
Combination of 2 or more elements
Where a substance goes through a chemical change
The smallest part of a chemical element
Number in front of symbol
A substance undergoes a chemical reaction

Down

subatomic particle with a positive electrical charge
Substance formed as a result of a chemical reaction
A subatomic particle with a neutral charge
Shows how many atoms of an an element are present

10 Clues: Number in front of symbol • Combination of 2 or more elements • The smallest part of a chemical element • A substance undergoes a chemical reaction • A subatomic particle with a neutral charge • A subatomic particle with a negative charge • Where a substance goes through a chemical change • Shows how many atoms of an an element are present • ...

Enzymes 2021-10-10

Across

the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
the pH resulting in maximal activity of a particular enzyme.
process modifying the molecular structure of a protein.
surface or material from which an organism grows or obtains its nourishment.
disruption of a chemical pathway due to one chemical inhibiting the effect of another by competing with it for binding or bonding.
increases the frequency with which the enzyme and substrate collide.
assumes that the active site of the enzyme and the substrate are equal shaped.

Down

a molecule that binds to an enzyme and decreases its activity.
type of inhibition that reduces the peak rate of a chemical reaction without changing the apparent binding affinity of the catalyst for the substrate.
will speed up the reaction.
class of macromolecules that perform a diverse range of functions for the cell.
a region on the surface of an enzyme whose shape permits binding only of a specific molecular substrate that then undergoes catalysis.
organic molecules that act as catalysts for chemical reactions.
the temperature at which an enzyme shows its highest activity.
a model for enzyme-substrate interaction.

15 Clues: will speed up the reaction. • a model for enzyme-substrate interaction. • process modifying the molecular structure of a protein. • the pH resulting in maximal activity of a particular enzyme. • a molecule that binds to an enzyme and decreases its activity. • the temperature at which an enzyme shows its highest activity. • ...

Chapter 7 Key Terms 2022-01-11

Across

A measure of the acidity and alkalinity of a substance; the pH scale has a range of 0 to 14, with 7 being a neutral. A pH below 7 is an acidic solution; a pH above 7 is an alkaline solution.
Also known as redox; chemical reaction in which the oxidizing agent is reduced and the reducing agent is oxidized.
liquids that are not capable of being mixed together to form stable solutions.
Easily absorbs moisture; in chemistry terms, capable of combining with or attracting water (water-loving).
The study of substances that do not contain the element carbon, but may contain the element hydrogen.
Unstable molecules that cause inflammation, disease, and biochemical aging in the body, especially wrinkling and sagging of the skin. Free radicals are super oxidizers that cause an oxidation reaction and produce a new free radical in the process that are created by highly reactive atoms or molecules (often oxygen).
When an acid is mixed with an alkali in equal proportions to neutralize each other and form water and a salt.
Characteristics that can be determined without a chemical reaction and that do not cause a chemical change in the identity of the substance.
The process through which oxygen is subtracted from or hydrogen is added to a substance through a chemical reaction.
A colorless gaseous element that makes up about four-fifths of the air in our atmosphere and is found chiefly in ammonia and nitrates.
Matter that has volume, no definite shape and will take shape of its container, such as water.
The abbreviation used for potential hydrogen; relative degree of acidity and alkalinity of a substance. pH represents the quantity of hydrogen ions.
most abundant of all substances, comprising about 75 percent of the Earth’s surface and about 65 percent of the human body.
A substance that dissolves the solute to form a solution.
Acronym for surface active agent; reduce surface tension between the skin and the product to increase product spreadability; allow oil and water to mix, or emulsify.
The smallest chemical components (often called particles) of an element that still retains the properties of that element.
A chemical combination of two or more atoms.
Having an affinity for or an attraction to fat and oils (oil-loving).
Change in the chemical properties of a substance that is the result of a chemical reaction in which a new substance or substances are formed that have properties different from the original.
A uniform mixture of two or more mutually miscible substances.
Substances that have a pH below 7.0, taste sour, and turn litmus paper from blue to red.
An unstable physical mixture of two or more immiscible substances (substances that normally will not stay blended) plus a special ingredient called an emulsifier.
A method of displaying data in multiples of 10.
Unstable mixtures of two or more immiscible substances.
Also known as bases; compounds that react with acids to form salts; have a pH above 7.0 (neutral), taste bitter, and turn litmus paper from red to blue.
An anion (an ion with a negative electrical charge) with one oxygen and one hydrogen atom.
Chemical compound of hydrogen and oxygen; a colorless liquid with a characteristic odor and a slightly acid taste.

Down

Combinations of two or more atoms of different elements united chemically with a fixed chemical composition, definite proportions, and distinct properties.
A state of matter that is rigid with a definite size and shape, such as ice.
An ion with a negative electrical charge.
Science that deals with the composition, structures, and properties of matter and how matter changes under different conditions.
Combination of two or more substances united physically, not chemically, without a fixed composition and in any proportions.
Colorless, odorless, tasteless gas; the lightest element known.
The most abundant element on Earth.
Rapid oxidation of any substance, accompanied by the production of heat and light.
Either the addition of oxygen or the loss of hydrogen; a chemical reaction that combines a substance with oxygen to produce an oxide.
Study of substances that contain carbon.
Droplets of water dispersed in an oil.
The gaseous mixture that makes up the Earth’s atmosphere. It is odorless, colorless, and generally consists of about 1 part oxygen and 4 parts nitrogen by volume.
Oil droplets dispersed in a water with the aid of an emulsifying agent.
Protective barrier of lipids and secretions on the surface of the skin.
Matter without a definite shape or size. No fixed volume or shape; takes the shape of its container.
Change in the form or physical properties of a substance without a chemical reaction or the formation of a new substance.
Used to stabilize skin care products by preventing oxidation that would otherwise cause a product to turn rancid and decompose. They are vitamins such as A, C, and E, which can be applied topically in products or taken internally to increase healthy body functions.
Those characteristics that can only be determined by a chemical reaction and a chemical change in the identity of the substance.
To combine or cause a substance to combine with oxygen.
Also known as compounds; a chemical combination of two or more atoms of different elements in definite (fixed) proportions.
Chemical reaction in which the oxidizing agent is reduced and the reducing agent is oxidized.
Any substance that occupies space and has mass (weight).
Ion with a positive electrical charge.
Molecule containing two or more atoms of the same element in definite (fixed) proportions.
The separation of an atom or molecule into positive or negative ions.
A substance that dissolves another substance to form a solution.
The three different physical forms of matter: solid, liquid, and gas.
Capable of being mixed; liquids that are mutually soluble, meaning that they can be mixed together to form stable solutions.
An atom or molecule that carries an electrical charge.
The simplest form of matter; cannot be broken down into a simpler substance without loss of identity.

57 Clues: The most abundant element on Earth. • Droplets of water dispersed in an oil. • Ion with a positive electrical charge. • Study of substances that contain carbon. • An ion with a negative electrical charge. • A chemical combination of two or more atoms. • A method of displaying data in multiples of 10. • An atom or molecule that carries an electrical charge. • ...

Year 9 Elements 2021-08-26

Across

a type of substance that is made up of 2 or more atom types that are chemically joined together
this type of change is irreversible
the substance(s) that are produced in a chemical reaction
a subatomic particle that is found in the nucleus that has no charge
this is the horizontal row that tells us how many electron shells an atom has
a positive test for this gas is if a glowing split relights
a type of substance that is made up of 2 or more substances that are NOT chemically joined together
a positive test for this gas is if a lit splint makes a pop sound
this number tells us the number of protons PLUS the number of neutrons
a subatomic particle that is found in shells around the nucleus and has a negative charge

Down

this kind of change involves only a substance changing it's state
this number tells us only the number of protons (and therefore electrons as atoms are neutral overall)
a subatomic particle that is found in the nucleus and has a positive charge
a positive test for this gas is if limewater goes cloudy
a type of substance that is made up of only one atom type
this column tells us the number of electrons in the last shell of an atom
the number of electrons in the last shell of silicon
the substance(s) that go into a chemical reaction
the element found in group 1, period 4
the symbol used to show the direction of a chemical reaction

20 Clues: this type of change is irreversible • the element found in group 1, period 4 • the substance(s) that go into a chemical reaction • the number of electrons in the last shell of silicon • a positive test for this gas is if limewater goes cloudy • the substance(s) that are produced in a chemical reaction • a type of substance that is made up of only one atom type • ...

Atoms, Elements & Compounds 2022-02-28

Atoms, Elements & Compounds crossword puzzle

Across

Evidence of a chemical reaction could be that the temperature goes ____ .
You would find ______ and neutrons in the nucleus
Look at your periodic table. Which element has 3 protons?
What charge does a proton have?
Look at your periodic table. Which element has an atomic mass of 24?
The element with the symbol C
This is formed when two or more atoms are bonded together. (M ________ )
The element with the symbol Pb
The element with the symbol O
Element with the symbol Al
Which subatomic particle has a neutral charge?
Element with the symbol Fe.
Evidence of a chemical reaction could be that there is a change of _______
Evidence of a chemical reaction could be that it gives out _______ (e.g. glow sticks)
Potassium + Oxygen -----> ________

Down

Dissolving, evaporating and melting are all examples of ________ changes because they can be reversed easily
The element with the symbol Cu
Overall, the nucleus has a ______ charge
When two or more atoms of DIFFERENT elements bond together you would make this. (C ________ )
Lithium + Oxygen ----> __________
Reactions such as Magnesium + Oxygen are known as _______ changes because they are difficult to reverse
Iron + Oxygen ----> _______
This is how many electrons you can fit in the second and third orbitals
We made this when we reacted Magnesium +Oxygen in the bunsen burner
Which subatomic particle would you find in orbitals around the nucleus?
What charge does an electron have?
Most of the mass of an atom is found in the _______ (middle)
This is how many electrons you can fit in the first orbital
Carbon + Oxygen ---> ___________

29 Clues: Element with the symbol Al • Iron + Oxygen ----> _______ • Element with the symbol Fe. • The element with the symbol C • The element with the symbol O • The element with the symbol Cu • The element with the symbol Pb • What charge does a proton have? • Carbon + Oxygen ---> ___________ • Lithium + Oxygen ----> __________ • What charge does an electron have? • ...

Units 7 & 8 Natural Science Crossword 2021-06-28

Units 7 & 8 Natural Science Crossword crossword puzzle

Across

the component of an electric circuit
mixture a mixture in which the different components cannot be distinguished.
mixture a mixture in which the different components can be distinguished.
substance a type of matter which contains only one type of
the force of attraction exerted by magnets.
the component of an electric circuit which transforms electricity into another type of energy.
reactions these happen when atoms react and group together differently.
a method used to separate solids from liquids in homogeneous mixtures.
charges to move.
a material which does not allow
a method used to separate liquids that have different boiling points in
another word

Down

a type of matter which contains two or more pure substances.
mixtures.
provides the electricity.
a chemical reaction that happens when objects or substances are burned.
a chemical reaction that happens in some living things, such as yeast and bacteria.
a chemical reaction that happens when some metal substances such as iron combine with oxygen in the presence of water.
a method used to separate substances of different density in heterogeneous mixtures.
an object which can attract other objects made of iron and other magnetic metals,
a closed path through which electricity flows.
a homogeneous mixture.
a material which allows electrical charges to move.
current the flow of electrical charges through materials.
a method used to separate solids from liquids, or solids with different size particles, in heterogeneous mixtures.
a device with a magnetic needle that always points north. We use it to orient
a connecting wire, usually made of copper,wrapped in plastic covering.

27 Clues: mixtures. • another word • charges to move. • a homogeneous mixture. • provides the electricity. • a material which does not allow • the component of an electric circuit • the force of attraction exerted by magnets. • a closed path through which electricity flows. • a material which allows electrical charges to move. • current the flow of electrical charges through materials. • ...

Biology Grade 9 Chp 1 2025-08-08

Across

…. material another term for reactant.
… cell is cell that helps form a stoma in a leaf, to allow gases in and out
hole in a leaf, formed between two guard cells
soluble carbohydrate which exists as small molecules
green substance that absorbs light, to get energy for photosynthesis.
substance made from elements
nutrients that living organisms need in small amounts for health, growth and repair. Also called mineral salts.
when a plant becomes floppy due to lack of water
…. solution where liquid turns from orange to blue-black when added to starch
green part of a cell that contains chlorophyll.
nutrient needed for energy
substance that changes in a chemical reaction to form products.

Down

substance made during a chemical reaction.
the spreading out of particles from where there are many (high concentration) to where there are fewer (lower concentration)
sugar made by digesting carbohydrates (in animals) and by photosynthesis (in plants).
…. respiration is respiration that requires oxygen to release energy from glucose
large insoluble carbohydrate made by plants to store energy
a series of chemical reactions in which carbon dioxide and water are converted to glucose and oxygen.
plant cell that is adapted to form hollow tubes to transport water
the loss of water vapor through the stomata on the surface of the leaves
to take in or soak up
…. reaction change in which new substances are produced.
…. cell is plant cell found in roots that is adapted for taking in water quickly

23 Clues: to take in or soak up • nutrient needed for energy • substance made from elements • …. material another term for reactant. • substance made during a chemical reaction. • hole in a leaf, formed between two guard cells • green part of a cell that contains chlorophyll. • when a plant becomes floppy due to lack of water • soluble carbohydrate which exists as small molecules • ...

Physical & Chemical Changes 2025-09-18

Physical & Chemical Changes crossword puzzle

Across

– State of matter with definite volume but no fixed shape.
– Two or more atoms bonded together.
– The amount of space an object takes up.
– Energy that moves from something warmer to cooler.
– Change from liquid to gas at the surface.
– The ability to cause change or do work.
– To become different in form, appearance, or nature.
– Change from solid directly to gas.
– Reddish-brown chemical change of iron with oxygen.
– A substance formed by a chemical reaction.
– State of matter with no definite shape or volume.
– A substance present at the start of a chemical reaction.
– The smallest part of an element.
– A mixture that looks the same throughout.
– State of matter with definite shape and volume.
– Chemical reaction that gives off heat and light.

Down

– Change from liquid to solid.
– Two or more substances combined but not bonded.
– A pure substance made of only one type of atom.
– Change from gas directly to solid.
– Anything that has mass and takes up space.
– Change from gas to liquid.
– How much matter is in an object.
– Change from liquid to gas throughout the liquid.
– Change from solid to liquid.
– A physical state of matter, like solid, liquid, or gas.
– A force that holds atoms together in a molecule.
– A high-energy state of matter made of charged particles.
– A substance made of two or more different elements.
– Dark coating that forms on some metals when they react.

30 Clues: – Change from gas to liquid. • – Change from liquid to solid. • – Change from solid to liquid. • – How much matter is in an object. • – The smallest part of an element. • – Change from gas directly to solid. • – Two or more atoms bonded together. • – Change from solid directly to gas. • – The amount of space an object takes up. • – The ability to cause change or do work. • ...

home work 2025-10-17

Across

has more than one cell
different populations of living things in the same environment
a word that describes a living thing or something that was once living in an environment
a substance that stops a chemical reaction to continue at a lower temperature
life, animal, plant, fungus, protist, or bacterium
a protein that is expanding the rate of a chemical reaction without changing
a system with living and non living organisms in the same environment
Dna within a cell with special functions

Down

energy needed to make a specific chemical reaction.
a explanation that can possibly be proven
a word that describes a non living thing in an environment
is a force between molecules that are alike

12 Clues: has more than one cell • Dna within a cell with special functions • a explanation that can possibly be proven • is a force between molecules that are alike • life, animal, plant, fungus, protist, or bacterium • energy needed to make a specific chemical reaction. • a word that describes a non living thing in an environment • ...

Atoms, Elements, Compounds 2025-11-12

Across

A substance formed as a result of a chemical reaction
A negatively charged particle found orbiting the nucleus
The central part of an atom containing protons and neutrons
A measure of how much matter an object contains
The smallest part of an element that can exist
A substance that takes part in and undergoes change during a chemical reaction

Down

A positively charged particle found in the nucleus of an atom
A neutral particle found in the nucleus of an atom
A pure substance made of only one type of atom
A substance made when two or more elements are chemically joined
Two or more atoms chemically bonded together
A substance that speeds up a chemical reaction without being used up

12 Clues: Two or more atoms chemically bonded together • A pure substance made of only one type of atom • The smallest part of an element that can exist • A measure of how much matter an object contains • A neutral particle found in the nucleus of an atom • A substance formed as a result of a chemical reaction • A negatively charged particle found orbiting the nucleus • ...

Photosynthesis and Cellular Respiration 2022-12-13

Photosynthesis and Cellular Respiration crossword puzzle

Across

The end result from a chemical reaction made by two or more reactants
Breathing
A chemical that changes because of chemical reaction
Natural sugar
The organelle photosynthesis takes place in

Down

Process used to turn glucose into energy
The organelle cellular respiration takes place
The chemical in plants that produces green pigment
The tiny holes in leaves that are necessary for photosynthesis
The process of plants making food for themselves using light

10 Clues: Breathing • Natural sugar • Process used to turn glucose into energy • The organelle photosynthesis takes place in • The organelle cellular respiration takes place • The chemical in plants that produces green pigment • A chemical that changes because of chemical reaction • The process of plants making food for themselves using light • ...

Vocab Review 3 2023-05-17

Across

An Italian scientist who classified the difference between atoms and molecules
A way to measure concentration and is the number of moles of solute dissolved.
The reactant that determines the amount of produce that can be formed by the reaction
Change in the amount of reactant or product in a unit of time
1 compound splits apart into 2 or more
Allows chemists to count the number of representative particles in a substance
Relates the amount of moles of any two substances in a chemical reaction
Converts between the mass of something
Dispersed/dissolved in the solvent
The reactant that is not completely used by the chemical reaction
A substance dissolves in a solvent to make a solution

Down

The minimum amount of energy to cause a reaction
A measure of the amount of solute that is dissolved in a given quantity of solvents
Explains why different reactions occur at different rates
A free element replaces another in a compound
Dissolves a solute
2 different elements or compounds unite to form a single, more complex substance
A substance dissolves in a solvent to make a solution

18 Clues: Dissolves a solute • Dispersed/dissolved in the solvent • 1 compound splits apart into 2 or more • Converts between the mass of something • A free element replaces another in a compound • The minimum amount of energy to cause a reaction • A substance dissolves in a solvent to make a solution • A substance dissolves in a solvent to make a solution • ...

Chemical Crossword! 2018-03-13

Across

a change; new substance forms
physically, not chemically combined
where products get their atoms
found in the periodic table
elements chemically combined
formed from reactants
are broken in a chemical reaction
no atoms are added or ___
chemical ___ represents an element

Down

atom __ = to # of protons or electrons
The basic building block of matter
a change; properties stay the same
negatively charged particles
The centre of an atom
positively charged particles
neutral subatomic particles
protons plus neutrons = atomic ____

17 Clues: The centre of an atom • formed from reactants • no atoms are added or ___ • found in the periodic table • neutral subatomic particles • negatively charged particles • elements chemically combined • positively charged particles • a change; new substance forms • where products get their atoms • are broken in a chemical reaction • The basic building block of matter • ...

Chemistry & Chemical Safety 2025-05-20

Chemistry & Chemical Safety crossword puzzle

Across

Sweet, colorless, oily substance used as a solvent and as a moisturizer in skin and body creams
Substances that allow oil and water to mix, or emulsify
Also known as bases; compounds that react with acids to form salts
Prolonged, repeated, or long-term exposure that can cause sensitivity
Characteristics that can be determined only by a chemical reaction and involve a chemical change in the substance
Molecule containing two or more atoms of the same element in definite (fixed) proportions
Subatomic particles with a negative charge
Also known as compounds; a chemical combination of two or more atoms of different elements in definite (fixed) proportions
A stable, uniform mixture of two or more substance
The basic unit of matter, with a nucleus at the center surrounded by negatively charged electrons that move around the nucleus in orbits.
A substance that releases oxygen
Liquids that are mutually soluble, meaning that they can be mixed together to form stable solutions
Chemical reaction that requires the absorption of energy or heat from an external source for the reaction to occur
A chemical combination of matter in definite (fixed) proportions
A substance that may cause cancer but not always
Having an affinity for or an attraction to fat and oils (oil-loving)
A physical combination of matter in any proportion
A substance that adds hydrogen to a chemical compound or subtracts oxygen from the compound
Alkaline substances used to neutralize acids or raise the pH of many hair products
Liquids that are not capable of being mixed together to form stable solutions
A change in the form or physical properties of a substance, without a chemical reaction or the creation of a new substance
The separation of an atom or molecule into positive and negative ions
A very strong alkali used in chemical products and cleaners; commonly known as lye

Down

A solution that has a pH above 7
Alcohols that evaporate easily, such as isopropyl alcohol
An ion with a positive electrical charge
An unstable physical mixture of two or more immiscible substances (substances that normally will not stay mixed) plus a special ingredient called an emulsifier
Characteristics that can be determined without a chemical reaction and do not involve a chemical change in the substance
A solution that has a pH below 7
The science that deals with the composition, structures, and properties of matter and how matter changes under different conditions.
A substance that causes or is believed to cause cancer
Easily absorbs moisture; in chemistry terms, capable of combining with or attracting water (water-loving)
Substances that should not be mixed or even stored near each other
Subatomic particles with a positive charge
Rapid Oxidation of a substance accompanied by the production of heat and light
Special type of oil used in hair conditioners, water-resistant lubricants for the skin, and nail polish dryers
The simplest form of chemical matter and contains only one type of atom.
The substance that dissolves the solute and makes the solution
An atom or molecule that carries an electrical charge
Chemical reaction that releases a significant amount of heat
Required by law for all products sold; include safety information about products compiled by the manufacturer, including hazardous ingredients, safe use handling procedures, proper disposal guidelines, and precautions to reduce the risk of accidental harm or overexposure
A colorless liquid or white crystals with a strong, unpleasant odor that is used in permanent waving solutions
Colorless gas with a pungent odor that is composed of hydrogen and nitrogen
An ingredient that brings two normally incompatible materials together and binds them into a uniform and fairly stable mixture
A change in the chemical composition or makeup of a substance
Any substance that occupies space and has mass (weight).
Subatomic particles with no charge
Unstable physical mixtures of undissolved particles in a liquid
A chemical combination of two or more atoms in definite (fixed) proportions
An ion with a negative electrical charge
An alpha hydroxy acid used in exfoliation and to lower the pH of products
The substance that is dissolved in a solution

52 Clues: A solution that has a pH above 7 • A solution that has a pH below 7 • A substance that releases oxygen • Subatomic particles with no charge • An ion with a positive electrical charge • An ion with a negative electrical charge • Subatomic particles with a positive charge • Subatomic particles with a negative charge • The substance that is dissolved in a solution • ...

Plants, Photosynthesis and Respiration 2021-09-03

Plants, Photosynthesis and Respiration crossword puzzle

Across

The great ___________ event provided the oxygen needed for the atmosphere 2.3 billion years ago
The organelle performing photosynthesis
A green pigment that helps to absorb light for photosynthesis
Plants can convert glucose into ___________ and oils for long-term storage
The organelle performing cellular respiration
An ___________ reaction releases heat
The ____________ tissue describes the tubes used by plants to carry substances inside of it
A ___________ assists in spreading pollen for plants
Spores and ___________ are two forms from which a new plant can grow
A chemical reaction producing carbon dioxide and water for all living things
The type of sugar used in respiration
Animals provide oxygen to their cells and remove carbon dioxide by __________

Down

A chemical reaction producing glucose and oxygen for plants
Microscopic organisms that carry out photosynthesis in the ocean
An ___________ is a plant with true flower A colourful part of the plant to attract animals
A structure in the cell with a specific function
A type of bacteria that carries out photosynthesis
energy is used by organisms to grow, repair damage, and ____________
transports water in plants
transports nutrients in plants
An ___________ reaction absorbs heat
This plant is the most commonly known pteridophyte
A plant must absorb ___________ in order to photosynthesise

23 Clues: transports water in plants • transports nutrients in plants • An ___________ reaction absorbs heat • An ___________ reaction releases heat • The type of sugar used in respiration • The organelle performing photosynthesis • The organelle performing cellular respiration • A structure in the cell with a specific function • A type of bacteria that carries out photosynthesis • ...

CWP Chapter 9/10 2025-10-28

Across

Definition for a type of reaction where heat is gained by the system from its surroundings
A _________ ion is one not involved in the reaction
Part of the universe where a chemical process occurs
Type of reaction where electrons are transferred from one atom to another
Definition of the maximal amount of solute that dissolves in a solvent at a specified temperature
Name of compound that when dissolved in water increases electrical conductivity
Term for amount of heat energy exchanged between system and surroundings in a chemical process
Which of the following is a weak acid, perchloric, nitric, or acetic?

Down

Expression of concentration in units of mol of solute per liter of solution
The standard heat of ________ defines the heat associated with the creation of 1 mole of compound from its elements at standard conditions
Method for measuring temperature changes to determine heats associated with chemical reactions
Thermochemical constant defining the amount of energy required to raise the temperature of 1g of substance 1oC (2 words)
Name of a protonated water molecule
Name of chemical equation expressed were none of the compounds are dissociated

14 Clues: Name of a protonated water molecule • A _________ ion is one not involved in the reaction • Part of the universe where a chemical process occurs • Which of the following is a weak acid, perchloric, nitric, or acetic? • Type of reaction where electrons are transferred from one atom to another • ...

Thermochemistry 2023-05-02

Across

Chemical reaction in which heat is absorbed
Heat Energy
water by 1°C, or about 4.2 joules
The result of the movement of tiny particles called atoms, molecules, or ions
A substance that takes part in an undergoes change during a reaction
The species formed from chemical reactions
The energy an object or particle has due to its motion
Units
The energy that comes from a source and travels through space at the speed of light
The energy required to raise the temperature of 1 gram of a substance by 1°C
The quantity of heat necessary to change 1 gram of solid to a liquid without temperature changes
the amount of heat needed to turn 1 gram of a liquid into vapor, without a rise in the temperature of the liquid

Down

The unit of temperature on the Celsius scale in the International System
A unit of measurement for temperature (thermodynamics)
solids, liquids and gases
in a state
The study of energy changes that occur during chemical reactions and
The unit of work or energy in the International System of Units
Chemical reaction in which heat is given off
The process by which heat is transferred by movement of a heated fluid, such as air or water
an energy unit equal to the approximate amount of energy required to raise 1 g
The process by which heat is transferred from the hotter end to the colder end of an object
The measurement of heat changes

23 Clues: Units • in a state • Heat Energy • solids, liquids and gases • The measurement of heat changes • water by 1°C, or about 4.2 joules • The species formed from chemical reactions • Chemical reaction in which heat is absorbed • Chemical reaction in which heat is given off • A unit of measurement for temperature (thermodynamics) • ...

Phase Change Vocabulary Crossword 2024-08-26

Phase Change Vocabulary Crossword crossword puzzle

Across

- A state of matter at the second lowest energy level in which molecules have a definite volume but no definite shape
- A state of matter at the third lowest energy level where molecules have no definite shape and no definite volume
- A reaction that changes the chemical form of the molecules
- The solids that form in a liquid in a chemical reaction
- A physical characteristic describing how matter reflects light (how shiny it is)
- A solid changing into a gas
- A liquid changing into a solid
- A process where matter changes from one state to another
- A liquid changing into a gas
- the study of how matter interacts with its environment and the changes produced

Down

- the study of motion and energy of matter
- A gas changing into a solid
- A reaction that does not change the chemical form of the molecules on its physical characteristics
- A state of matter at the lowest energy level in which molecules have a definite shape and definite volume
- the study of life
- A physical characteristic describing how hard a material is in comparison to other materials
- the study of Earths process and celestial bodies (astronomy)
- A gas changing into a liquid
- The ability to do work through physical or chemical means
- A solid changing into a liquid
- A state of matter at the highest energy level where molecules have no definite shape and no definite volume and electrons are not bound to any atom and roam freely

21 Clues: - the study of life • - A gas changing into a solid • - A solid changing into a gas • - A gas changing into a liquid • - A liquid changing into a gas • - A liquid changing into a solid • - A solid changing into a liquid • - the study of motion and energy of matter • - The solids that form in a liquid in a chemical reaction • ...

Tarek Ankar-Burdette (Enzyme) 2026-01-20

Tarek Ankar-Burdette (Enzyme) crossword puzzle

Across

The metabolic process of breaking down a large molecule
Best Temp or pH for the particular reaction
The process where proteins lose their 3D shape
The set of metabolic pathways that build complex molecules from simpler ones
A molecule that binds to an enzyme to block activity
The substance that is the result of a chemical reaction

Down

Any substance that enters a chemical reaction
Consists of one nitrogen atom and two hydrogen atoms
A specific pocket on a protein seperate from the active site
The highest point at which an enzyme-catalyzed reaction can occur
Hydrogen Peroxide

11 Clues: Hydrogen Peroxide • Best Temp or pH for the particular reaction • Any substance that enters a chemical reaction • The process where proteins lose their 3D shape • Consists of one nitrogen atom and two hydrogen atoms • A molecule that binds to an enzyme to block activity • The metabolic process of breaking down a large molecule • ...

Atoms and Molecules 2023-04-10

Across

a process in which one or more substances are converted to one or more different substances
a reaction in which atoms of the reactant rearrange to create different substances as products
negative charge
a substance that changes when it is combined with another substance in a chemical reaction
smallest part of a substance; cannot be broken down chemically
neutral electric charge (neither positive nor negative)
what holds atoms together in molecules

Down

a reaction in which a change to the physical properties of a material or substance occurs
positive charge
houses electrically positive protons and electrically neutral neutrons
substances produced at the end of a chemical reaction
the smallest unit of a substance that has all the properties of that substance; can be broken down into atoms

12 Clues: positive charge • negative charge • what holds atoms together in molecules • substances produced at the end of a chemical reaction • neutral electric charge (neither positive nor negative) • smallest part of a substance; cannot be broken down chemically • houses electrically positive protons and electrically neutral neutrons • ...

Chemistry 3 Review Crossword 2020-02-13

Chemistry 3 Review Crossword crossword puzzle

Across

Evil things that float around in the sky and judge me and contribute to global warming
A jedi who lived in the swamps of Degobah
A chemical reaction in which the temperature measured in the reaction would decrease
The scientific standard unit of energy
Using electrolysis to coat an objecting in a metal
A chemical reaction which gives off light
A metal which cannot be mined and must be obtained through electrolysis

Down

One way of extracting oil from fruits using heating and cooling
Electrolysis of water produces oxygen and ...
A unit of energy found on food packaging
Lowers the activation energy of a reaction
The electrode to which the negative ions move

12 Clues: The scientific standard unit of energy • A unit of energy found on food packaging • A jedi who lived in the swamps of Degobah • A chemical reaction which gives off light • Lowers the activation energy of a reaction • Electrolysis of water produces oxygen and ... • The electrode to which the negative ions move • Using electrolysis to coat an objecting in a metal • ...

Compounds, Molecules, and Chemical Equations Review! 2023-01-12

Compounds, Molecules, and Chemical Equations Review! crossword puzzle

Across

Cannot be created or destroyed
Atoms at the end of a chemical reaction
A group of atoms bound together
Releases H cations in water
Latin word for "four"
Number in front of molecule to show how many

Down

Atoms at the start of a chemical reaction
Different elements joined together
Totally neutral pH value
Substance made of only one type of atom
Another name for "base"
Latin word for "six"
Arrow that means "creates"

13 Clues: Latin word for "six" • Latin word for "four" • Another name for "base" • Totally neutral pH value • Arrow that means "creates" • Releases H cations in water • Cannot be created or destroyed • A group of atoms bound together • Different elements joined together • Substance made of only one type of atom • Atoms at the end of a chemical reaction • ...

Enzyme 2026-03-03

Across

other molecules, called inhibitors, inhibit the activity of enzymes. That is, they reduce or stop the enzyme from functioning. Reducing enzyme activity also reduces the reaction rate.
organic molecules such as vitamins and NAD+. Organic cofactors
fit describes a flexible active site that changes shape, or conforms, to the substrate as they bond together.
is one that absorbs free energy from the surroundings.
Catabolism is the process of breaking down large molecules into smaller ones. As the bonds break, free energy is released.
Anabolism is the process of making large molecules from smaller ones. Free energy is absorbed from the surroundings to build new chemical bonds

Down

are the molecules formed as a result of a chemical reaction, which are produced from reactants.
The energy required to start any reaction
is the sum of all the chemical reactions occurring in that cell.
is one that has a net release of free energy.
are the starting molecules that undergo a chemical reaction, which are converted into products.
and key describes the active site as having a set shape

12 Clues: The energy required to start any reaction • is one that has a net release of free energy. • is one that absorbs free energy from the surroundings. • and key describes the active site as having a set shape • organic molecules such as vitamins and NAD+. Organic cofactors • is the sum of all the chemical reactions occurring in that cell. • ...

Chapter 8.1 Challenge 2019-07-29

Across

cofactor needed for succinate dehydrogenase in the Kreb's cycle.
nonprotein portion of an enzyme
speeds up the rate of a chemical reaction without being used up in that reaction
enzyme inhibition when another substance binds to the substrate's active site
breakdown of large molecules
another name for a dehydration synthesis reaction
larger enzymes may have this level of protein organization
binds to enzyme's active site

Down

chemically unstable enzyme
enzyme transported extracellularly
enzyme inhibition involving enzymes with two binding sites
energy needed to begin a reaction
weak bonds that maintain shape of apoenzyme are broken
term used to describe an enzyme that is always present
protein portion of an enzyme
enzyme retained intracellularly
molecules required for a successful hydrolysis reaction
build-up of complex molecules from simpler precursors

18 Clues: chemically unstable enzyme • breakdown of large molecules • protein portion of an enzyme • binds to enzyme's active site • nonprotein portion of an enzyme • enzyme retained intracellularly • energy needed to begin a reaction • enzyme transported extracellularly • another name for a dehydration synthesis reaction • build-up of complex molecules from simpler precursors • ...

choice board #3 2021-01-25

Across

cant be created nor destroyed
end of a reaction
represents chemical reaction
arrows on a chemical equation

Down

written or printed below the line
what make up a product
everything is equal
not everything is equal on both sides
placed in front of chemical formula

CHEMICAL REACTIONS AND EQUATIONS 2023-09-28

CHEMICAL REACTIONS AND EQUATIONS crossword puzzle

Across

Reaction in which heat is released along with the formation of products.
The substances which take part in a chemical reaction.
A process in which the original substance loses its nature and identity to form a new substance with different properties.
Loss of electrons
Type of decomposition carried out by passing electricity.
Gain of electrons
A process in which metal is deteriorated by the action of air, moisture, chemicals, etc.

Down

A type of decomposition carried out by heating.
The substances which are formed in a chemical reaction.
Reaction in which a compound splits into two or more simpler substances.
When decomposition is carried out in the presence of sunlight.
Reactions which need energy in the form of heat, light or electricity to break reactants.
The reaction in which two or more reactants combine to form a single product.
The process of slow oxidation of oil and fat, present in food materials resulting in foul odour and taste.
The reactions in which a more reactive element displaces a less reactive element from its salt solution.

15 Clues: Loss of electrons • Gain of electrons • A type of decomposition carried out by heating. • The substances which take part in a chemical reaction. • The substances which are formed in a chemical reaction. • Type of decomposition carried out by passing electricity. • When decomposition is carried out in the presence of sunlight. • ...

Redox Time Travel 2021-06-20

Across

The _________ number or state as the charge of an element in a compound if electron transfer occurs in an atom to form a chemical bond with another atom
The electrode where the reduction reaction takes place in electrolytic cell
Substance agent that is oxidised in a redox reaction with other substances
Shorthand cell ________ representation of a chemical cell with the anode on the left and the cathode on the right is separated by two vertical lines representing a salt bridge or porous pot
Substance agent that is reduced in a redox reaction with other substances
Reaction that takes place when a reactant gains oxygen, loses hydrogen, loses electron and reduced oxidation number
Redox reaction in which there is an oxidation process of iron to hydrated iron(III)oxide, Fe2O3.xH2O
Reaction that takes place when a reactant loses oxygen, gains hydrogen, gains electron and increased oxidation number
Process of decomposition of a compound in a molten state or an aqueous solution to its constituent elements when electric current is passed through it

Down

The electrode terminal where the voltaic cell redox reaction takes place in anode
Electrode _________ is the _________ (voltage) produced when equilibrium is established between metal M & the aqueous solution containing metal M ions in a half-cell
The electrode where the oxidation reaction takes place in electrolytic cell
Substance agent that is reduced in a redox reaction with other substances
Substance agent that is oxidised in a redox reaction with other substances
Potential difference produced in half-cells under conditions with a concentration of ion in an aqueous solution (1.0 moldm-3) at 25 degrees celcius/298K, 1 atm pressure/101 kPa & coupled with ________ hydrogen electrode of platinum as inert electrode when half-cell is not a metal electrode
The electrode terminal where the voltaic cell redox reaction takes place in cathode
Chemical reactions that involve oxidation & reduction that occur simultaneously

17 Clues: Substance agent that is reduced in a redox reaction with other substances • Substance agent that is reduced in a redox reaction with other substances • Substance agent that is oxidised in a redox reaction with other substances • Substance agent that is oxidised in a redox reaction with other substances • ...

Redox Time Travel 2021-06-20

Across

Redox reaction in which there is an oxidation process of iron to hydrated iron(III)oxide, Fe2O3.xH2O
Substance agent that is reduced in a redox reaction with other substances
Substance agent that is oxidised in a redox reaction with other substances
The electrode where the reduction reaction takes place in electrolytic cell
Process of decomposition of a compound in a molten state or an aqueous solution to its constituent elements when electric current is passed through it
Reaction that takes place when a reactant gains oxygen, loses hydrogen, loses electron and reduced oxidation number
The electrode where the oxidation reaction takes place in electrolytic cell
Reaction that takes place when a reactant loses oxygen, gains hydrogen, gains electron and increased oxidation number
Substance agent that is oxidised in a redox reaction with other substances

Down

The electrode terminal where the voltaic cell redox reaction takes place in cathode
The _________ number or state as the charge of an element in a compound if electron transfer occurs in an atom to form a chemical bond with another atom
Electrode _________ is the _________ (voltage) produced when equilibrium is established between metal M & the aqueous solution containing metal M ions in a half-cell
Chemical reactions that involve oxidation & reduction that occur simultaneously
Shorthand cell ________ representation of a chemical cell with the anode on the left and the cathode on the right is separated by two vertical lines representing a salt bridge or porous pot
Substance agent that is reduced in a redox reaction with other substances
The electrode terminal where the voltaic cell redox reaction takes place in anode
Potential difference produced in half-cells under conditions with a concentration of ion in an aqueous solution (1.0 moldm-3) at 25 degrees celcius/298K, 1 atm pressure/101 kPa & coupled with ________ hydrogen electrode of platinum as inert electrode when half-cell is not a metal electrode

BIOCHEMISTRY 2015-02-01

Across

it is a measure to determine the acidity or alkalinity of a solution or a substance
water-soluble compound that reacts with acid
a chemical substance formed as a result of a chemical reaction
A type of homogenous mixture in which the particles of one or more substances (the solute) are distributed uniformly throughout another substance (the solvent)
A sugar (carbohydrate) composed of two monosaccharides, thus yields two monosaccharide molecules on complete hydrolysis
ACID Any of the group of a long chain of hydrocarbon derived from the breakdown of fats (through a process called hydrolysis). It has a single carboxylic group andaliphatic tail.
(usually water molecules) through a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.
Any of a class of carbohydrates formed by repeating units linked together by glycosidic bonds
The basic building block of nucleic acids, It is an organic compound made up of nitrogenous base, a sugar, and a phosphate group
An extremely small particle or substance, especially at cellular or structural leve
the act or state of adhering; state of being adhered or united
ACID Any of the group of complex compounds consisting of linear chains of monomeric nucleotides whereby each monomeric unit is composed of phosphoric acid, sugar and nitrogenous base,
The act, state or process of sticking together
An energy-rich compound made up of a single molecule of glycerol and three molecules of fatty acid, and serves as a major component of animal and plant oils and fats
molecules that catalyze (i.e., increase the rates of) chemical reactions
A substance consisting of atoms or ions of two or more elements that are chemically bonded together
The presence of or having distinct and opposite poles
A liquid in which substances (or solutes) are dissolved forming a solution

Down

A double-stranded nucleic acid that contains the genetic information for cell growth, division, and function
group of synthetic hormones including prednisone, prednisolone, methylprednisolone and dexamethasone
A lipid consisting of a glycerol bound to two fatty acids and a phosphate group
ENERGY The energy that an atomic system must acquire before a process (can occur
A simple sugar, example: fructose, glucose, and ribose.
A large complex molecule, such as nucleic acids, proteins, carbohydrates, and lipids, with relatively large molecular weight
Any of the group of organic compounds consisting of carbon, hydrogen, and oxygen, usually in the ratio of 1:2:1
ACID The building block of protein in which each is coded for by a codon and linked together through peptide bonds
Describes a chemical reaction that absorbs energy (usually in the form of heat)
A molecule composed of polymers of amino acids joined together by peptide bonds. It can be distinguished from fats and carbohydrates by containing nitrogen.
A substance capable of initiating or speeding up a chemical reaction
A substance taking part in a chemical reaction
A fatty or waxy organic compound that is readily soluble in nonpolar solvent (e.g. ether) but not in polar solvent (e.g water)
describes a chemical reaction that releases energy (usually in the form of heat)
The passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration
A type of RNA that carries the code or chemical blueprint for a specific protein
They are chemical compounds which yield hydrogen ions or protons when dissolved in water

35 Clues: water-soluble compound that reacts with acid • A substance taking part in a chemical reaction • The act, state or process of sticking together • The presence of or having distinct and opposite poles • A simple sugar, example: fructose, glucose, and ribose. • a chemical substance formed as a result of a chemical reaction • ...

Chapter 13 Ben Ruetz 2020-02-26

Across

there is a net absorption of energy
if changed, the equilibrium shifts to oppose change, until new equilibrium is reached
there is a net release of energy
when reaction and it’s reverse act at the same rate

Down

when there is a plus sign on the right side of the chemical equation
is a substance that lowers the activation energy of a chemical reaction
No atoms are gained or lost during any reaction
is the minimum energy required to overcome the initial breaking of bonds in reactants
when there is an oxide in the chemical eqution
when there is a plus sign on the left side of the chemical equation

10 Clues: there is a net release of energy • there is a net absorption of energy • when there is an oxide in the chemical eqution • No atoms are gained or lost during any reaction • when reaction and it’s reverse act at the same rate • when there is a plus sign on the left side of the chemical equation • when there is a plus sign on the right side of the chemical equation • ...

Chapter 2 2019-01-17

Across

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
acid
any of a class of sugars whose molecules contain two monosaccharide residues.
amino acid
also known as Bohr’s atomic model
A reaction where bonds are broken.
a bond involving the sharing of electrons netween atoms
the outermost shell of an atom containing the valence electrons.
Basic unit of a chemical element.
anything that has mass and takes up space
a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
a substance that accepts hydrogen ions
spheroproteins
A number equal to the sum of all the neutrons and the protons in an atom's nucleus.
an example of monosaccharides
a radioactive isotope.
include wax and oil
antibodies is an example of this
chemical reaction in which an acid and a base react quantitatively with each other.
molecules consist of many nucleotides linked in a long chain.
a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances. Creates a new substance.
ribonucleic acid
the energy of a body or a system with respect to the motion of the body or of the particles in the system.
power
structure of dna
particle with a neutral charge
another term would be inert energy
a carbohydrate whose molecules consist of a number of sugar molecules bonded together.
a polysaccharide
a lipid containing a phosphate group in its molecule
a solution that resists changes in pH when acid or alkali is added to it.
organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, and glucose.
a group of atoms bonded together
Also known as Electron shells
Adenosine triphosphate
protein
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei

Down

the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
a measure of the hydorgen ion concentration of a solution
also known as triglycerides
letters that represent an element
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
the ionized or ionizable constituents of a living cell, blood, or other organic matter.
fibrous proteins
Carbon-containing compound.
created in 1869
Positive subatomic particle.
a substance that liberates hydrogen ions when in an aqueous solution.
Energy form directly involved in putting the matter into motion.
Composed of 2 or more elements.
a region on an enzyme that binds to a protein or other substance during a reaction.
the base
Lack of carbon; compound.
a change from one state (solid or liquid or gas) to another without a change in chemical composition
process in which molecules are formed, changed, or broken down.
A bond that forms when electrons are transferred from one atom to another.
energy form stored in the bonds of chemicals
a lipid
electrical charge
atomic mass
one of a class of substances that cannot be separated into simpler substances by chemical means.
single sugar
also known as Rutherford atomic model
a lipid
A reaction where 2 or more molecules or atoms combine to form a larger and more complex molecule.
energy that travels by waves or particles
A reaction where bonds are broken and combined.
form the basic structural unit of nucleic acids
particle with a negative charge
deoxyribonucleic acid

72 Clues: acid • power • a lipid • a lipid • protein • the base • amino acid • atomic mass • single sugar • spheroproteins • created in 1869 • fibrous proteins • ribonucleic acid • structure of dna • a polysaccharide • electrical charge • include wax and oil • deoxyribonucleic acid • a radioactive isotope. • Adenosine triphosphate • Lack of carbon; compound. • also known as triglycerides • Carbon-containing compound. • ...

Enzymes 2026-03-03

Across

The chemical to which an enzyme binds are the enzyme's substrates
absorbs free energy from the surroundings.
Organic molecules such as vitamins and NAD+
hinder the activity of enzymes. That is, they reduce or stop the enzyme from functioning.
the end substances created at the conclusion of an enzyme-catalyzed chemical reaction
the process of making large molecules from smaller ones.

Down

The energy required to start any reaction
a net release of free energy.
The model of enzyme activity describes a flexible active site that changes shape, or conforms, to the substrate as they bond together.
The sum of all the chemical reactions occurring in that cell.
the process of breaking down large molecules into smaller ones.
The model describes the active site as having a set shape. The substrate molecules fit perfectly into active site, like a key in a lock. Once in the active site, the chemical reaction can take place.

12 Clues: a net release of free energy. • The energy required to start any reaction • absorbs free energy from the surroundings. • Organic molecules such as vitamins and NAD+ • the process of making large molecules from smaller ones. • The sum of all the chemical reactions occurring in that cell. • the process of breaking down large molecules into smaller ones. • ...

Honors Biology - Chapter 2: Chemistry of Life - Vocabulary 2016-09-05

Honors Biology - Chapter 2: Chemistry of Life - Vocabulary crossword puzzle

Across

attractive force that holds molecules of a single substance together
atoms of the same element that have a different number of neutrons
attractive force that holds atoms together
attraction between molecules that results in the rise of the surface of a liquid when in contact with a solid
the OH- ion created when one water molecule pulls apart another water molecule
protein or RNA molecule that speeds up metabolic reactions without being permanently changed or destroyed
solution that has a greater number of hydroxide ions than hydronium ions
the amount of solute dissolved in a fixed amount of solvent
solution in which no more solute can dissolve
center of the atom, makes up most of the mass, contains protons and neutrons
amount of energy needed to start a reaction
substances that cannot be broken down chemically into simpler kinds of matter
reduce the amount of activation energy needed for a reaction to take place
simplest particle of an element that retains all the properties of that element
compares the relative concentrations of hydronium ions and hydroxide ions in a solution, ranges from 0-14, 0 is very acidic, 7 is neutral, & 14 is very basic
mixture in which one or more substances are uniformly distributed in another substance
chemical substances that neutralize small amounts of either an acid or a base added to a solution
atom or molecule with an electrical charge
forms when 2 atoms share one or more pairs of electrons
simplest part of a substance that retains all of the properties of that substance
equal to the total number of protons and neutrons of an atom

Down

the ability to do work
substance dissolved in the solvent
atoms of 2 or more elements that are combined in fixed proportions
particle that has no charge
solution that has a greater number of hydronium ions than hydroxide ions
starting substances in a chemical reaction, shown on the left side of a chemical equation
attractive force between oppositely charged ions which form when electrons are transferred from one atom to another
attractive force between a hydrogen molecule with a with a partial positive charge and another atom or molecule with a partial or full negative charge
attractive force between two particles of different substances
solution in which water is the solvent
the H3O+ ion created when a free H+ ion reacts with a water molecule
one or more substances change to produce one or more different substances
reaction in which a reactant gains one or more electrons becoming more negative in charge
reaction in which a reactant loses one or more electrons becoming more positive in charge
the quantity of matter an object has
3-dimensional region around a nucleus that indicated the probable location of an electron
reaction in which electrons are transferred between atoms
anything that occupies space and has mass
molecule with unevenly distributed charges
negatively charged particle
number of protons in an atom
all of the chemical reactions that occur in an organism
positively charged particle
substances formed during a chemical reaction, shown on the right side of a chemical equation
Biology Chapter 2: Chemistry of Life – Vocabulary
substance in which the solute is dissolved

47 Clues: the ability to do work • particle that has no charge • negatively charged particle • positively charged particle • number of protons in an atom • substance dissolved in the solvent • the quantity of matter an object has • solution in which water is the solvent • anything that occupies space and has mass • attractive force that holds atoms together • ...

Balancing Equations Vocabulary 2022-03-29

Balancing Equations Vocabulary crossword puzzle

Across

The number of atoms of the element (small #)
The substances you start with
A rearrangement of atoms
Chemical equations need to be balanced to satisfy this
The substances you end with

Down

This has the same number of each type of atom on both sides of the arrow
A number placed in front of a term to indicate how many molecules take part in the reaction (big #
The combination of elements that are in a substance
Solid, liquid, gas, and aqueous are all examples of these
A written representation of a chemical reaction
This tells you that the reactants became the product through a chemical reaction

11 Clues: A rearrangement of atoms • The substances you end with • The substances you start with • The number of atoms of the element (small #) • A written representation of a chemical reaction • The combination of elements that are in a substance • Chemical equations need to be balanced to satisfy this • Solid, liquid, gas, and aqueous are all examples of these • ...

CHEMISTRY 2025-10-02

Across

term used to describe oxisides organic materials (usually food)
most gas found in air composition
a substance that oxidises another substance during a redox reaction and it self reduced during the reaction (9 letter, 5 letters))
chemical reaction in which a substance reacts with oxygen (exothermic reactions)
element that has symbol C (6 letters)

Down

chemical reaction by which biological cells release the energy stored in glucose for use by the cell
fossil fuel formed from the remains of ancient marine plants/animals that can be used as fuel for transportations
reaction in which oxygen is added to an element/compound
reaction involving both reduction and oxidation
missing electron during redox reaction (4 letters)

10 Clues: most gas found in air composition • element that has symbol C (6 letters) • reaction involving both reduction and oxidation • missing electron during redox reaction (4 letters) • reaction in which oxygen is added to an element/compound • term used to describe oxisides organic materials (usually food) • ...

CHEMISTRY 2025-10-02

Across

term used to describe oxisides organic materials (usually food)
most gas found in air composition
a substance that oxidises another substance during a redox reaction and it self reduced during the reaction (9 letter, 5 letters))
chemical reaction in which a substance reacts with oxygen (exothermic reactions)
element that has symbol C (6 letters)

Down

chemical reaction by which biological cells release the energy stored in glucose for use by the cell
fossil fuel formed from the remains of ancient marine plants/animals that can be used as fuel for transportations
reaction in which oxygen is added to an element/compound
reaction involving both reduction and oxidation
missing electron during redox reaction (4 letters)

Chapter 2 2019-01-17

Across

Basic unit of a chemical element.
(protein) antibodies is an example of this
Adenosine triphosphate
A reaction where bonds are broken and combined.
a substance that accepts hydrogen ions
anything that has mass and takes up space
single sugar
a measure of the hydorgen ion concentration of a solution
A reaction where 2 or more molecules or atoms combine to form a larger and more complex molecule.
created in 1869
particle with a neutral charge
(reaction)process in which molecules are formed, changed, or broken down.
(protein)spheroproteins
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
(atomic __) the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
particle with a negative charge
Positive subatomic particle.
the ionized or ionizable constituents of a living cell, blood, or other organic matter.
A reaction where bonds are broken.
a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
(model) also known as Bohr’s atomic model
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
deoxyribonucleic acid
Carbon-containing compound.
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
include wax and oil; fatty acid

Down

a change from one state (solid or liquid or gas) to another without a change in chemical composition
a bond involving the sharing of electrons netween atoms
a carbohydrate whose molecules consist of a number of sugar molecules bonded together.
form the basic structural unit of nucleic acids
a radioactive isotope.
energy that travels by waves or particles
organic compound composed of carbon, hydrogen, and oxygen; includes starches, sugars, and glucose.
chemical reaction in which an acid and a base react quantitatively with each other.
one of a class of substances that cannot be separated into simpler substances by chemical means.
a substance that liberates hydrogen ions when in an aqueous solution.
the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
Energy form directly involved in putting the matter into motion.
the outermost shell of an atom containing the valence electrons.
A bond that forms when electrons are transferred from one atom to another.
the energy of a body or a system with respect to the motion of the body or of the particles in the system.
any of a class of sugars whose molecules contain two monosaccharide residues.
a group of atoms bonded together
Lack of carbon; compound.
(atomic __) A number equal to the sum of all the neutrons and the protons in an atom's nucleus.
a region on an enzyme that binds to a protein or other substance during a reaction.
electrical charge
fibrous proteins
(atomic __)atomic mass
another term would be inert energy
Composed of 2 or more elements.
a solution that resists changes in pH when acid or alkali is added to it.
amino acid
(atomic __)letters that represent an element
ribonucleic acid

55 Clues: amino acid • single sugar • created in 1869 • fibrous proteins • ribonucleic acid • electrical charge • deoxyribonucleic acid • a radioactive isotope. • Adenosine triphosphate • (atomic __)atomic mass • (protein)spheroproteins • Lack of carbon; compound. • Carbon-containing compound. • Positive subatomic particle. • particle with a neutral charge • particle with a negative charge • ...

Vocabulary Review 2022-03-29

Across

One of the 5 types of reactions, involves combining two or more reactants to form one product
(2 words) The substance you have extra (leftovers) of in a chemical reaction.
Bonding between two or more nonmetals
The substance the solute gets dissolved into in a solution
Bonding between a metal and a nonmetal
Surface _____ is what causes water to bead together and behave as if it has a thin skin on its surface.
A unit of measurement for energy/heat
Heat is absorbed. Listed in an equation as a reactant
Celcius plus 273
The measure of the average kinetic energy of a substance
Used to convert between moles of one substance in a reaction to moles of another substance
Very strong attractive force that holds water molecules to each other is called ____ bonding.
Energy absorbed is ___ to energy released
In a chemical equation, what is listed AFTER the arrow
One of the 5 types of reactions, the products are always carbon dioxide and water vapor.
In a chemical equation, what is listed BEFORE the arrow
Nonpolar substance only dissolve in ____ substances
Used to balance chemical equations. Placed before the chemical formula
A reaction where electrons are gained and the charge decreases (think OIL RIG)
(2 words) The substance that runs out first in a chemical reaction and stops the reaction.
A graph of this type of reaction would have a negative delta H. The products have less energy than the reactants.

Down

A type of solution in which more solute can be dissolved.
(2 words) Calculated for a compound by multiplying the number of each atom by the mass on the periodic table and adding all products together.
The substance dissolved into a solution
A reaction where electrons are lost and the charge increases (think OIL RIG)
A unit that measures the amount of a substance. It is equal to 6.02 x 10^23 particles of that substance and the molar mass of that substance.
(2 words) Actual Yield divided by theoretical yield times 100.
CaCO3 (calcium carbonate) is ___ when you try to dissolve it in water.
(2 words) One of the 5 types of reactions, involves an element replacing another in a compound. May or may not occur, must check the Activity Series.
One of the 5 types of reactions, involves one reactant breaking apart into multiple products
For this type of solute, as temperature increases, solubility decreases
A way of calculating the energy released by an object by comparing it to the energy absorbed by another substance (usually water)
A solution that conducts electricity. Ionic compounds are this.
(2 words) The amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celcius. For water it is 1 cal/g(degree C).
Energy of motion
In chemistry, the energy stored in bonds
Moles divided by Liters
A type of solution that has the maximum amount of solute dissolved as allowed at a given temperature.
A homogenous mixture where a solute is dissolved into a solvent
When the electrons in a covalent bond are shared unequally and cause areas of partially positive charge and partially negative charge
The universal solvent

41 Clues: Energy of motion • Celcius plus 273 • The universal solvent • Moles divided by Liters • Bonding between two or more nonmetals • A unit of measurement for energy/heat • Bonding between a metal and a nonmetal • The substance dissolved into a solution • In chemistry, the energy stored in bonds • Energy absorbed is ___ to energy released • ...

Chapter 13 Vocabulary Afrodite Poulos 2016-10-10

Chapter 13 Vocabulary Afrodite Poulos crossword puzzle

Across

Forming bonds ________ energy
A substance that is the result of a chemical change
A substance that undergoes chemical change
Plus sign has to be on product side of arrow
must be added to break bonds
Little number to the right of the element or compound
Chemical reactions rearrange...

Down

Energy is transferred to reactions from surroundings (usually cool)
Energy transfers from reactants to surroundings (usually as heat)
A single element reacts with a compound and takes the place of another single element in that compound
The energy stored in molecules that can be released during a reaction
The _____ in a chemical reaction always points to the product
Big number to the left of the element or compound
Plus sign has to be on reactant side of arrow
A compound and an oxidant is reacted to produce heat and a new product

15 Clues: must be added to break bonds • Forming bonds ________ energy • Chemical reactions rearrange... • A substance that undergoes chemical change • Plus sign has to be on product side of arrow • Plus sign has to be on reactant side of arrow • Big number to the left of the element or compound • A substance that is the result of a chemical change • ...

Unit 10 (Redox) REVIEW 2023-05-07

Across

Electrolytic cells will always require a _______.
When oxidation occurs the oxidation number will ________.
Reduction occurs at which cathode?
A type of chemical reaction that will always be considered a "redox" reaction.
Loss of electrons
For ions to travel in an electrochemical cell.

Down

For electrons to travel on in an electrochemical cell.
When reduction occurs the oxidation number will ________.
Type of electrochemical cell that converts chemical energy to electrical energy
Type of electrochemical cell that converts electrical energy to chemical energy
Gain of electrons
Oxidation occurs at which electrode?

12 Clues: Gain of electrons • Loss of electrons • Reduction occurs at which cathode? • Oxidation occurs at which electrode? • For ions to travel in an electrochemical cell. • Electrolytic cells will always require a _______. • For electrons to travel on in an electrochemical cell. • When reduction occurs the oxidation number will ________. • ...

Juan David Suarez 2022-01-17

Across

consisting of many different and connected parts
the external form, contours, or outline of someone or something
zone which make chemical reaction.
in chemistry, any substance that increases the rate of a reaction without itself being consumed.
a strong covering holding the pages of a book together.
are molecules that are very inportant for your body we can find in meer.

Down

the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
is a person who is used by a fashion designer or clothing manufacturer to check the fit.
the base on which an organism lives the soil is the substrate of most seed plants.
happens when one chemical substance is transformed into one or more different substances
molecule organic which make a chemical reaction

11 Clues: zone which make chemical reaction. • molecule organic which make a chemical reaction • consisting of many different and connected parts • a strong covering holding the pages of a book together. • the external form, contours, or outline of someone or something • are molecules that are very inportant for your body we can find in meer. • ...

Ch.2 Vocab 2022-01-20

Across

the process by which one or more substances change to produce one or more different substances
in any physical change or chemical reaction, mass is conserved; mass can be neither created nor destroyed
a change that produces matter with a different composition than the original matter
a substance present at the start of a reaction
A substance made up of atoms of two or more different elements joined by chemical bonds
A homogeneous mixture of two or more substances
a solid that forms and settles out of a liquid mixture
a substance produced in a chemical reaction

Down

some properties of a material change, but the composition of the material does not change
a mixture in which the composition is not uniform throughout
a quality or condition of a substance that can be observed or measured without changing the substance's composition
A mixture in which substances are evenly distributed throughout the mixture
the ability of a substance to undergo a specific chemical change
Gaseous state of a substance that is a liquid or a solid at room temperature
A measure of the amount of matter in an object

15 Clues: a substance produced in a chemical reaction • a substance present at the start of a reaction • A measure of the amount of matter in an object • A homogeneous mixture of two or more substances • a solid that forms and settles out of a liquid mixture • a mixture in which the composition is not uniform throughout • ...

chemistry 2017-03-23

Across

a substance that increases the rate of a reaction but is not used up in the reaction
a mixture of a solute dissolved in a solvent such as water
a small number of active molecules (such as acid) in a solution
this refers to an acid solution with a high concentration of hydrogen ions
a reaction that involves the breakdown of a compound into simpler substances
a reaction that involves oxygen and releases light and heat energy

Down

an ion that does not take part in a chemical reaction
a theory stating that the particles involved in a chemical reaction must collide in order to react
a reaction in which and acid and a base combine to produce a metal salt and water
an object or substance that can be broken down by bacteria, fungi and other living organisms
an insoluble compound formed in a precipitation reaction

11 Clues: an ion that does not take part in a chemical reaction • an insoluble compound formed in a precipitation reaction • a mixture of a solute dissolved in a solvent such as water • a small number of active molecules (such as acid) in a solution • a reaction that involves oxygen and releases light and heat energy • ...

Chemistry Crossword 2018-12-10

Across

pure substance that cannot be broken down into other substances contains one atom
substance that speeds up chemical reactions
Solid, liquid, gas and plasma
Change of stare from a solid to gas or a gas to a solid
Change in the appearance or state of a substance that does not change the composition
Measure of atomic mass
chemical reaction that produces heat
ability of a substance to conduct electricity or heat
a material that electricity or heat can move through easily
description of a solid that can be stretched into a long wire
positively charged center of an atom contains protons and nuetrons
A system of easy-to-use warning symbols for hazardous materials
chemical combination of two or more substances in a specific ratio
invisible negatively charged particle that orbits the nucleus of an atom
Change of state from a liquid to a solid
Catalyst involved in chemical reactions in living things

Down

slow chemical change that occurs when oxygen in the air reacts with metal
Change of state from a liquid to a gas
chemical reaction that absorbs heat
group 17 elements in the periodic table least reactive metals
number of protons in the nucleus equal to electrons
pure substance formed when at least one ,metal and nonmetal combine
Amount of mass in a given volume of a substance
Change of state from a gas to a liquid
Change of state from solid to a liquid

Ch. 2 AH Biology 2024-08-29

Across

/ biological catalysts; mostly proteins
/ substance formed by the chemical combination of two or more elements in definite proportions
/ negatively charged particle; located in the space surrounding the nucleus
/ smallest unit of most compounds that displays all the properties of that compound
/ a compound that prevents sharp, sudden changes in pH
/ compound with an amino group on one end and a carboxyl group on the other end
/ energy input that is needed for a reaction to begin
/ the center of an atom, which contains the protons and neutrons
/ an atom that has a positive or negative charge
/ process that changes, or transforms, one set of chemicals with another set of chemicals
/ dissolving substance in a solution
/ a subunit of which nucleic acids are composed
/ substance that is dissolved in a solution
/ macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorous
/ compound that prevents sharp, sudden changes in pH

Down

/ elements or compounds that enter into a chemical reaction
/ weak attraction between a hydrogen atom and another atom
/ sight attraction that develops between oppositely charged regions of nearby molecules
/ material composed of two or more elements or compounds that are physically mixed together but not chemically combined
/ reactant of an enzyme-catalyzed reaction
/ chemical bond formed when one or more electrons are transferred from one atom to another
/ one of several forms of a single element, which contains the same number of protons but a different number of neutrons
/ type of bond between atoms in which the electrons are shared
/ force of attraction between different kinds of molecules
/ compound that produces hydroxide ions (OH-) in solution, solutions with a pH level of more than 7
/ macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
/ elements or compounds created by a chemical reaction
/ a small chemical unit that makes up a polymer
/ a scale with a values from 0 to 14, used to measure the concentration of H+ ions in a solution
/ compound that forms hydrogen ions (H+) in solution, a solution with a pH of less then 7
/ attraction between molecules of the same substance
/ pure substance that consists entirely of one type of atom
/ substance that speeds up the rate of a chemical reaction
/ compound made of carbon, hydrogen, and oxygen atoms; types of nutrients that are major sources of energy to the body
/ type of mixture in which all the components are evenly distributed
/ macromolecule that contains carbon, hydrogen, oxygen, nitrogen; needed by the body for growth and repair
/ the basic unit of matter
/ a molecule composed of many monomers; makes up macromolecules

38 Clues: / the basic unit of matter • / dissolving substance in a solution • / biological catalysts; mostly proteins • / reactant of an enzyme-catalyzed reaction • / substance that is dissolved in a solution • / a small chemical unit that makes up a polymer • / a subunit of which nucleic acids are composed • / an atom that has a positive or negative charge • ...

Unit 2 biology Crossword 2024-12-19

Unit 2 biology Crossword crossword puzzle

Across

a measure of the concentration of hydrogen ions in a solution
a chemical bond wherein there is a transfer of an electron from one atom to another
enzyme that occurs naturally in the saliva of some mammals and humans that aids in the process of digestion
a stable subatomic particle with positive electric charge
things that lock in with enzymes
members of a family of an element that all have the same number of protons but different numbers of neutrons
a process by which one or more reactants are converted into one or more products
end substances after a biological process has occurred
a biological catalyst and is almost always a protein that helps break stuff down
a group of two or more atoms that are held together by attractive forces known as chemical bonds
the structure in a cell that contains the chromosomes
a chemical bond that involves the sharing of electrons to form electron pairs between atoms
The smallest part of a substance that cannot be broken down chemically
the electromagnetic attraction created between a partially positively charged hydrogen atom attached to a highly electronegative atom and another nearby electronegative atom
The substances which participate in a chemical reaction
the specific region of an enzyme where a substrate binds and catalysis takes place or where chemical reaction occurs
an enzyme the body uses to break down fats in food so they can be absorbed in the intestines.

Down

an enzyme that hydrolyses peptide bonds
a substance that can be dissolved into a solution by a solvent
a chemical bond wherein there is a transfer of an electron from one atom to another
substance (molecule) with the ability to dissolve other substances (solutes) to form a solution
A small particle with a negative charge that is found in all atoms
molecules that have a dipole or an uneven distribution of charge across their geometry resulting in one side being positive and the other side negative
a homogeneous mixture of one or more solutes dissolved in a solvent
a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction
attraction and repulsions between atoms, molecules, as well as other intermolecular forces
a unique substance that consists of two or more elements combined in fixed proportions
an enzyme that is responsible for oxidizing ethanol and converting it into nicotinamide adenine dinucleotide
a pure substance consisting of only one type of atom which all have the same numbers of protons in their nuclei.
one of the three subatomic particles that make up an atom
The minimum energy required for a reaction to occur

31 Clues: things that lock in with enzymes • an enzyme that hydrolyses peptide bonds • The minimum energy required for a reaction to occur • the structure in a cell that contains the chromosomes • end substances after a biological process has occurred • The substances which participate in a chemical reaction • a stable subatomic particle with positive electric charge • ...

Cellular Respiration and Photosynthesis 2023-01-23

Cellular Respiration and Photosynthesis crossword puzzle

Across

BONUS:the green pigment in chloroplasts
one of the reactants of cellular respiration- with the chemical formula C6H12O6
the organelle where the majority of the ATP is made in Cellular Respiration
one of the reactants of cellular respiration- the gas organisms breathe in and chemical formula O2
This chemical reaction turns glucose and oxygen into ATP (energy) Carbon Dioxide (CO2) and Water (H20)
Plants use this chemical reaction to turn carbon dioxide (CO2), water (H2O), and sunlight into Glucose and Oxygen (O2)

Down

gas that humans breathe out- reactant in photosynthesis and product in cellular respiration
Bonus:Increasing the amount of exercise increased the ___________ _______
the green organelle in plants that make glucose and oxygen during photosynthesis
Bonus: the full name of the chemical that changed color from blue to yellow
Humans' source of glucose comes from...
BONUS: the number of carbon dioxide and water molecules in the photosynthesis equation
BONUS: this energy process causes the burning feeling in your muscles- happens in the cytoplasm
a reactant in photosynthesis and product of cellular respiration- chemical formula H20
BONUS: the number of oxygen molecules in cellular respiration chemical equation
these 3 letters together are another name for energy

16 Clues: BONUS:the green pigment in chloroplasts • Humans' source of glucose comes from... • these 3 letters together are another name for energy • Bonus:Increasing the amount of exercise increased the ___________ _______ • Bonus: the full name of the chemical that changed color from blue to yellow • ...

Chemistry Crossword 2015-12-02

Across

invisible negatively charged particle that orbits the nucleus of an atom
an experiment in which all reactants and all products of a chemical reaction are accounted for
the amount of mass in a given volume of substance
positively charged center of an atom
mass of a substance tha can dissolve in a given amount of solvent to form a saturated solution at a given temperature
description of a solid that can be stretched into a long wire
description of a substance that can be pounded or rolled into sheets
change in appearance or state of a substance that does not change the comopsition
substances that helps a chemical reaction to proceed more quickly
is the ability of a substance to conduct electricity or heat
number of protons in a nucleus of one atom of an element
change of state from a liquid to a solid

Down

orbit of electrons around the nucleus of an atom
anything that has mass and occupies space
chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
measure of atomic mass
change of state from a gas to a liquid
the smallest part of an element that is a representative of that element
change of state from a liquid to a gas
slow chemical change that occurs when oxygen in the air reacts with metal
ability to do work
group of 17 elements in the periodic table
change of state from a solid to a liquid

23 Clues: ability to do work • measure of atomic mass • positively charged center of an atom • change of state from a gas to a liquid • change of state from a liquid to a gas • change of state from a solid to a liquid • change of state from a liquid to a solid • anything that has mass and occupies space • group of 17 elements in the periodic table • ...

Scientific Terms 2014-08-12

Across

A solution that contains a small quantity of solute compared to the solvent.
Solution A solution in which the maximum amount of solvent has been dissolved.
To charge with carbon-dioxide gas.
Able to dissolve other substances
The process when molecules change from the liquid phase to a gas phase.
The settling of particles onto a surface. (Ofter Gas to Liquid)
The opposite of evaporation.
Change An object that can be changed to, and back to its original form.
A chemical type that donates electrons.
A compound that has a sour taste.
Two substances that are combined and dissolved.

Down

Reaction A chemical change that forms new substances.
Of Matter Liquid, Solid, Gas
This form changes shape according to its container.
To cause particle to separate evenly throughout a solid, liquid or gas.
The transition from a solid phase to gas phase without going through the liquid stage.
Concentrated A mixture of two or more liquids.
Change Solute A change that can't go back to its original state.
The particles are very very fast.
The process when a substance changes from a liquid to a solid because the temperature becomes very cold.
An object of which the particles are packed tight very close to each other.
A small portion of matter.
A chemical reaction between a fuel and a oxidizing agent.
A loss of electrons during a reaction
The process when a substance changes from a solid phase to a liquid phase.

25 Clues: A small portion of matter. • Of Matter Liquid, Solid, Gas • The opposite of evaporation. • The particles are very very fast. • Able to dissolve other substances • A compound that has a sour taste. • To charge with carbon-dioxide gas. • A loss of electrons during a reaction • A chemical type that donates electrons. • Concentrated A mixture of two or more liquids. • ...

N.Sc 2024-07-05

Across

a chemical reaction that happens when objects or substances are burned.
a chemical reaction that happens in some living things, such as yeast and bacteria
current the flow of electrical charges through materials.
a type of matter which contains two or more pure substances.
circuit a closed path through which electricity flows.
a material which does not allow electrical charges to move.
a method used to separate substances of different density in heterogeneous
a material which allows electrical charges to move.
mixture :a mixture in which the different components can be distinguished.
a chemical reaction that happens when some metal substances such as iron combine with oxygen in the presence of water
mixture :a mixture in which the different components cannot be distinguished.

Down

an object which can attract other objects made of iron and other magnetic metals.
reactions these happen when atoms react and group together differently.
a device with a magnetic needle that always points north. We use it to orient ourselves.
a method used to separate solids from liquids in homogeneous mixtures.
a method used to separate solids from liquids, or solids with different size particles, in heterogeneous mixtures.
another word for a homogeneous mixture.
the force of attraction exerted by magnets.
substance a type of matter which contains only one type of component.
a connecting wire, usually made of copper, wrapped in plastic covering.
a method used to separate liquids that have different boiling points in homogeneous mixtures
the component of an electric circuit which provides the electricity.
the component of an electric circuit which transforms electricity into another type of energy.

23 Clues: another word for a homogeneous mixture. • the force of attraction exerted by magnets. • a material which allows electrical charges to move. • circuit a closed path through which electricity flows. • current the flow of electrical charges through materials. • a material which does not allow electrical charges to move. • ...

AP Bio Unit 3 2024-10-25

Across

Temperature at which an enzyme works best.
Loss of enzyme function due to shape change.
Theory where the enzyme fits perfectly with the substrate
Substance that blocks the active site of an enzyme.
pH value at which an enzyme functions most efficiently.
Energy needed to start a chemical reaction.

Down

Temporary structure formed when an enzyme binds to its substrate.
Reactant that an enzyme acts upon
Process of speeding up a chemical reaction
Molecule that binds elsewhere, altering enzyme function.
Region on an enzyme where substrates bind
that speeds up chemical reactions

12 Clues: Reactant that an enzyme acts upon • that speeds up chemical reactions • Region on an enzyme where substrates bind • Process of speeding up a chemical reaction • Temperature at which an enzyme works best. • Energy needed to start a chemical reaction. • Loss of enzyme function due to shape change. • Substance that blocks the active site of an enzyme. • ...

Chemistry of Living Things UG1 checkpoint 2022-08-09

Chemistry of Living Things UG1 checkpoint crossword puzzle

Across

the starting materials in a chemical reaction
a chemical reaction that absorbs thermal energy from its surroundings (it feels cold to touch)
a change when no new substance is formed
a change when a new substance is formed

Down

the burning of a fuel, where it reacts with oxygen to create heat and light
a process in which one or more reactants are converted to one or more different substances
the process by which food, in the form of sugar (glucose), is transformed into energy within cells
a substance that is formed as the result of a chemical reaction
a chemical reaction that produces heat (it feels hot to touch)

9 Clues: a change when a new substance is formed • a change when no new substance is formed • the starting materials in a chemical reaction • a chemical reaction that produces heat (it feels hot to touch) • a substance that is formed as the result of a chemical reaction • the burning of a fuel, where it reacts with oxygen to create heat and light • ...

Chemistry of Living Things UG1 checkpoint 2022-08-09

Across

the starting materials in a chemical reaction
a chemical reaction that absorbs thermal energy from its surroundings (it feels cold to touch)
a change when no new substance is formed
a change when a new substance is formed

Down

the burning of a fuel, where it reacts with oxygen to create heat and light
a process in which one or more reactants are converted to one or more different substances
the process by which food, in the form of sugar (glucose), is transformed into energy within cells
a substance that is formed as the result of a chemical reaction
a chemical reaction that produces heat (it feels hot to touch)

Organic chemistry 2025-05-09

Across

The type of reaction that involves burning a substance in oxygen.
Long-chain molecules formed from repeating units.
Organic compound group characterized by a –COOH group.
A type of reaction where two compounds exchange ions.
The property that tends to increase with molecular size in a homologous series.
A reaction where two substances combine to form one product.
A branch of chemistry focused on carbon-containing compounds.
Hydrocarbons with only single bonds.
The term for the part of a molecule responsible for its chemical reactions.
A series of compounds with the same functional group and similar chemical properties.
Compounds used to treat diseases, often synthesized organically.

Down

Structural type that shows each atom and bond in a molecule.
Combustion produces carbon dioxide and this substance.
The process of breaking down a compound into simpler substances.
A functional group found in alcohols.
Different compounds with the same molecular formula but different structural formulas.
The simplest class of organic compounds composed of only carbon and hydrogen.
A substance derived from petroleum used in making plastics.
A type of reaction that involves one element replacing another in a compound.
Naturally occurring polymers include starch and this protein found in hair.

20 Clues: Hydrocarbons with only single bonds. • A functional group found in alcohols. • Long-chain molecules formed from repeating units. • A type of reaction where two compounds exchange ions. • Combustion produces carbon dioxide and this substance. • Organic compound group characterized by a –COOH group. • A substance derived from petroleum used in making plastics. • ...

Acids & Bases 2013-03-12

Across

________ is the weakest acid.
Corrosive is a common WHMIS _______ when handling acids and bases.
A ___________ compound is a chemical substance formed by elements sharing valence electrons.
Ionic and molecular compounds will both turn _______ when bromothymol blue is added.
An ________ compound is a chemical substance formed from the mutual attraction of positive and negative ions.
The pH range of an acid is zero to ________.
Basic compounds taste ________.
The substance that donates or loses a hydrogen ion to another substance during a chemical reaction.

Down

The substance that accepts or gains a hydrogen ion from another substance during a chemical reaction.
Hydroxide is the _________ base.
A litmus paper in sodium hydroxide will be ______.
Acidic compounds taste ________.
A neutral molecular compound will not ________ electricity.
Spill an acid - put a base on it such as ________ soda.
A litmus paper in hydrochloric acid will be ______.

15 Clues: ________ is the weakest acid. • Basic compounds taste ________. • Hydroxide is the _________ base. • Acidic compounds taste ________. • The pH range of an acid is zero to ________. • A litmus paper in sodium hydroxide will be ______. • A litmus paper in hydrochloric acid will be ______. • Spill an acid - put a base on it such as ________ soda. • ...

ie/y_e 2025-04-29

Across

A small harp-like instrument from ancient times
To speed up a chemical reaction without being used up
To examine something carefully to understand it better
To compete eagerly for something
A substance in the body that helps speed up chemical reactions
A lot of talk or advertising that makes something seem exciting
A type of neckwear shaped like two triangles

Down

A particular way of doing or presenting something
A strong-smelling chemical used to preserve things
A black-and-white bird known for its loud call and stealing shiny things
A pile of wood used to burn a dead body in some traditions
A person who helps a priest or leader during a ceremony
To clean the blood using a machine when kidneys don’t work
A group or kind of something, often used in printing or writing
To break down a substance using water in a chemical reaction

15 Clues: To compete eagerly for something • A type of neckwear shaped like two triangles • A small harp-like instrument from ancient times • A particular way of doing or presenting something • A strong-smelling chemical used to preserve things • To speed up a chemical reaction without being used up • To examine something carefully to understand it better • ...

Previous Page 62 of 100 Next