A change from one state of matter to another is called a phase change.

Here are some examples of phase changes:

* Solid to Liquid: Melting (e.g., ice melting into water)

* Liquid to Solid: Freezing (e.g., water freezing into ice)

* Liquid to Gas: Vaporization (e.g., water boiling into steam)

* Gas to Liquid: Condensation (e.g., steam condensing into water droplets)

* Solid to Gas: Sublimation (e.g., dry ice turning directly into carbon dioxide gas)

* Gas to Solid: Deposition (e.g., frost forming directly from water vapor)