Vocab - Science

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Across
  1. 3. are changes affecting the form of a chemical substance, but not its chemical composition. used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
  2. 4. A substitution reaction is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. Substitution reactions are of prime importance in organic chemistry.
  3. 6. is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.
  4. 9. that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the concept
  5. 10. a substance that takes part in and undergoes change during a reaction.
  6. 13. the production of chemical compounds by reaction from simpler materials. Or the combination of ideas to form a theory or system.
  7. 15. the state or process of rotting; decay.
  8. 16. a number placed in front of a chemical symbol or formula. It shows how many atoms or molecules of the substance are involved in the reaction. For example, two molecules of hydrogen would be written as 2H2
  9. 18. the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
  10. 20. a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process.
  11. 21. is any property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its changes between momentary states. are often referred to as observables. They are not modal properties.
Down
  1. 1. is a process that leads to the chemical transformation of one set of chemical substances to another.
  2. 2. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  3. 5. Hot, or burning, is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.
  4. 7. mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.
  5. 8. is a type of thermodynamic system where mass is conserved within the boundaries of the system, but energy is allowed to freely enter or exit the system.
  6. 11. is the study of substances—that is, elements and compounds—while biology is the study of living things. However, these two branches of science meet in the discipline of biochemistry, which studies the substances in living things and how they change within an organism.
  7. 12. a substance which slows down or prevents a particular chemical reaction or other process or which reduces the activity of a particular reactant, catalyst, or enzyme.
  8. 14. At the most fundamental level, is composed of elementary particles known as quarks and leptons (the class of elementary particles that includes electrons). Quarks combine into protons and neutrons and, along with electrons, form atoms of the elements of the periodic table, such as hydrogen, oxygen, and iron.
  9. 16. is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished such as… mass concentration, molar concentration, number concentration, and volume concentration.
  10. 17. material such as coal, gas, or oil that is burned to produce heat or power. or , supply or power (an industrial plant, vehicle, or machine) with fuel. Or, cause (a fire) to burn more intensely.
  11. 19. are the species formed from chemical reactions.