| A | B |
|---|
| Melting | Changes from solid to liquid |
| Evaporation | Changes from liquid to gas |
| Sublimation | Changes from solid to gas |
| Condensation | Changes from gas to liquid |
| Boiling | Liquid is hot enough to form bubbles |
| Latent heat | Energy absorbed or released in a change of phase |
| Heat of fusion | Energy needed to change a substance from solid to liquid |
| Heat of vaporization | Energy needed to change a substance from liquid to gas |
| Liquid | Definite volume, no definite shape |
| Solid | Definite volume, definite shape |
| Gas | No definite volume, no definite shape |
| Plasma | A fourth phase of matter composed of high energy nuclei |
