The occur when a compound makes a transition between two of the following: A solid, a liquid, or a gas

The occur when a compound makes a transition between two of the following: A solid, a liquid, or a gas. They are all physical changes, as the composition of the material is unchanged.

These phase transitions are as follows:

1)Melting: Solid to liquid

2)Freezing: Liquid to solid

3)Vaporizing: Liquid to gas

4)Condensing: Gas to liquid

5)Subliming: Solid to gas

6)Deposition: Gas to solid

Of course, there are other physical changes that you can perform as well. For example, if you hit a window with a brick, the window will shatter, which is also a physical change.