Temperature, Heat, and Matter

Vocabulary #5

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



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





Freezing: the change of a liquid into a
solid.
Melting: the change of solid into
liquid.





Boiling: the formation of bubbles
of vapor that escape from a liquid
that is being heated.





Evaporation: the vaporization of molecules from the surface
of a liquid.
Vaporization: the change of a liquid to a gas as molecule
 free from each other.
Condensation: the change of a gas into a liquid as molecules
 attract each other.