The conversion of a substance from one of the three physical states of matter to another is called a phase change.

Here are the common phase changes:

* Solid to Liquid: Melting

* Liquid to Solid: Freezing

* Liquid to Gas: Evaporation (or boiling)

* Gas to Liquid: Condensation

* Solid to Gas: Sublimation

* Gas to Solid: Deposition