| A | B |
| melting | the change in state from solid to a liquid |
| melting point | temperature when melting occurs |
| freezing | the change of state from a liquid to a solid |
| vaporization | the change in state from a liquid to a gas |
| evaporation | vaporization that takes place only on the surface of a liquid |
| boiling | vaporization that takes place both below and at the surface of a liquid |
| boiling point | the temperature at which a liquid boils |
| condensation | the change in state from a gas to a liquid |
| sublimation | occurs when the surface particles of a solid gain enough energy that they form a gas |