| A | B |
| Heat | Form of energy that causes partcles of matter to move faster & farther apart |
| Temperature | Measures average kinetic energy of particles |
| Freezing point | Liquid changes to solid |
| Melting point | Same as the freezing point of a substance |
| Evaporation | Changes from liquid to a gas at the surface |
| Conduction | Heat transfers through solids |
| Convection current | Up and down movement in liquids and gases |
| Thermal expansion | Heating causes substance to get larger in volume |
| calorie | Amount of heat needed to raise temp. of 1 g. water 1 degree C. |
| Absolute zero | -273 degrees C., lowest possible temp. |
| Kinetic energy | Moving particles |