Vocabular 5 - Temperature, Heat, And Matter.

Thermal expansion: the expansion of matter when its temperature is raised.

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

melting: the change of a solid into liquid.

vaporization: the change ofliquid to gas as molecules break free from each other.

Condensation: the change of gas into a liquid as molecules attract each other.

freezing: the change of a liquid into a solid.

boiling: the formationof bubbles of vapor that escape from a liquid that is being heated.

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