| A | B |
|---|
| Evaporation | A liquid changes to a gas gradually at temperatures below its boiling point |
| Melting | solid changes into a liquid state |
| Freezing | Liquid changes into the solid state |
| Sublimation | A solid changes directly into the gas state without going through the liquid state |
| Condensation | When a gas changes to a liquid |
| Heat of Fusion | The amount of energy needed to change a material from the solid state to the liquid state |
| Heat of Vaporization | The amount of energy required to change a material from the liquid state to the gas state |
| Boiling | Add heat to a liquid until it reaches a temperature at which it changes to bubbles of gas |
| Joule | A unit for Heat |
| Temperature | The states of matter depend on this |
