Vocabulary #5 Temperature, Heat and Matter

1-thermal expansion: the expansion of matter when its temperature is raised.

2-pressure: the force on each unit of area of a surface.

3-melting: the change of a solid into a liquid,

4-vaporization: the change of a liquid to a gas as molecules break free from echa other.

5-condensation: the change of a gas into a liquid as molecules attract each other.

6-freezing: the change of a liquid into a solid.

7-boiling: the formation of bubbles of vapor that escape from a liquid that is being heated.

8-evaporation: the vaporization of molecules from the surface of a liquid.