| A | B |
|---|
| Solid | A state of matter in which materials have a definite shape and volume. |
| Liquid | A state of matter in which materials have no definite shape, but do have definite volume. |
| Gas | A state of matter in which materials have no definite shape or volume. |
| Kinetic Energy | Energy of motion. |
| Pressure | The result of a force distributed over an area. |
| Absolute Zero | Temperature at which all motion stops. |
| Charles's Law | If the pressure and the number of particles remain constant and the temperature increases then the volume will increase. |
| Boyle's Law | If the temperature and the number of particles remain the same and the pressure increases then the volume will decrease. |
| Volume | The amount of space an object occupies. |
| Temperature | A measure of how hot or cold an object is compared to a reference point. |
| Phase Change | A reversible physical change that occurs when a substance changes from one state of matter to another. |
| Endothermic | A change in which energy is absorbed from its surroundings. |
| Exothermic | A change in which energy is released to its surroundings. |
| Vaporization | A phase change in which a substance changes from a liquid into a gas. |
| Evaporation | A phase change in which a substance changes from a liquid to gas on the surface of the liquid at temperatures below the boiling point. |
| Boiling | A phase change in which a substance changes from a liquid to a gas anywhere throughout the liquid. |
| Melting | A phase change in which a substance changes from a solid to a liquid. |
| Freezing | A phase change in which a substance changes from a liquid to solid. |
| Condensation | A phase change in which a substance changes from a gas to a liquid. |
| Plasma | A state of matter in which the atoms have been stripped of their electrons. |
| Sublimation | A phase change in which a substance changes from a solid to a gas. |
| Deposition | A phase change in which a substance changes from a gas to a solid. |
