Across
- 3. The ability to do work. Energy exists in many forms and can transfer between objects or change form.
- 4. Scientific law that states that matter and energy cannot be created or destroyed, but can only transfer between objects or transform to a different form. Also called the law of conservation of matter and energy.
- 6. The change in state from a solid directly to a gas caused by adding energy. sublimation is the opposite of deposition.
- 8. A change in matter that doesn't alter its chemical identity. Physical changes include changes of state, changing shape, polishing, dissolving, etc.
- 9. A material made of only one kind of element or compound; not a mixture
- 14. The change of state from a liquid to a gas at the boiling point. Boiling is a form of vaporization that occurs when the pressure in the liquid exceeds the atmospheric pressure.
- 17. The change in state from a liquid to a gas caused by adding energy. Vaporization is the opposite of condensation.
- 19. Work is done when a force acts on a moving object in the same or opposite direction of its motion or when energy is transferred from one object to another.
- 20. The amount of space that an object occuples.
- 21. The change in state from a liquid to a solid caused by removing energy. Freezing is the opposite of melting.
- 23. The measure of the amount of matter in an object.
- 27. The change of state from a liquid to a gas below the boiling point but above the freezing point. Evaporation is a form of vaporization that occurs when particles near the surface of the liquid gain sufficient energy to escape the liquid.
- 30. A physical combination of two or more substances. Mixtures can be separated by physical means.
- 31. The physical form of matter described by its physical characteristics. The state of a pure substance largely depends on its temperature. Matter can be a solid. liquid, gas, or plasma. Phase of matter is another term for state of matter.
- 32. The change in state from a gas directly to a solid caused by removing energy. Deposition is the opposite of sublimation.
- 33. A fluid state of matter in which the particles move so fast and are so far apart as to have little interaction with each other. Gases have both a changeable shape and volume.
Down
- 1. The change from one pure substance to another by the rearrangement of atoms in a chemical reaction. We typically recognize chemical changes by a change in color, change in energy, formation of a gas, and/or formation of a solid.
- 2. the force of gravitational attraction between an object's mass and its resident planet.
- 5. The hotness or coldness of a substance, stated in degrees; a measure of the average kinetic energy of the particles of a substance.
- 7. A change of one element into another atom. Nuclear changes can occur when atoms emit or absorb rays or particles. It can also occur in nuclear reactions when atoms split apart through fissions or join together through fusion.
- 10. Two or more chemically bonded atoms. Molecules can be made of just one kind of element or a combination of elements.
- 11. A pure substance formed by chemically combining two or more elements.
- 12. A fluid state of matter made of extremely hightemperature ionized particles. Plasma have both a changeable shape and volume. Since stars are made of plasma. It is the most common state of matter in the universe.
- 13. Anything that has mass and takes up space; a physical substance
- 15. A fluid state of matter in which the particles are free to move but are held close to each other. A liquid substance has an unchanging volume but a changeable shape.
- 16. A push or a pull on an object.
- 18. A charged atom or group of atoms caused by a charge imbalance, which is produced by an unequal number of protons and electrons.
- 22. A pure substance made of only one kind of atom.
- 24. The attractive force between any two objects based on their masses. The strength of gravity decreases rapidly as the two objects move apart.
- 25. A rigid state of matter in which the particles align in a fixed arrangement. A solid substance has an un-changing shape and volume.
- 26. The change in state from a gas to a liquid caused by removing energy. Condensation occurs at the dew point and is the opposite of vaporization.
- 28. The smallest neutral particle of an element that retains the characteristics of that element. atoms are composed of a positive nucleus containing protons and usually neutrons, surrounded by negatively charged electrons.
- 29. The change of state from a solid to a liquid at the melting point that is caused by adding energy. Melting is the opposite of freezing.