| A | B |
| Solid | state in which matter has a definite shape and volume |
| Liquid | the state in which matter takes the shape of its container |
| Gas | the state in which matter changes in both shape and volume |
| Pressure | the amount of force exerted on a given area |
| Boyle's Law | the law that states that for a fixed amount of gas at a constant temperature, the volume of a gas increases as its pressure decreases |
| Chares' Law | the law that states that for a fixed amount of gas at a constant pressure, the volume of a gas increases as its temperature increases |
| Plasma | the state of matter that does not have a definite shape or volume and whose particles have broken apart |
| Melting | the change of state from a solid to a liquid |
| Freezing | the cahnge of state from a liquid to a solid |
| Endothermic | term used to describe a change in which energy is absorbed |
| Exothermic | a term used to describe a change in which energy is released or removed |
| Vaporization | the change of state from a liquid to a gas |
| Boiling | vaporization that occurs throughout a liquid |
| Evaporation | vaporization that occurs at the surface of a liquid below its boiling point |
| Condensation | the change of state from a gas to a liquid |
| Sublimation | the change of state from a solid directly to a gas |