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

Here are some examples:

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

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

* Liquid to gas: Evaporation (e.g., water evaporating into steam)

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

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

* Gas to solid: Deposition (e.g., frost forming on a window)

These changes are physical because they don't involve the formation of new substances, just changes in the arrangement and movement of molecules.