| A | B |
|---|
| absolute zero | the lowest possible temperature at which particle motion almost stops |
| thermal expansion | expansion of a substance caused by heating |
| boiling point | the temperature at which a liquid turns to a gas |
| convection currents | the up and down movement of gases or liquids caused by heat transfer |
| melting point | the temperature at which a solid changes into a liquid |
| freezing point | the temperature at which a liquid turns into a solid |
| convection | heat transfer in gases and liquids |
| conduction | heat transfer in solids |
| radiation | transfer of heat through space |
| CALORIE | 1 kilocalorie |
| evaporation | the change in state from a liquid to a gas at the surface of the liquid |
| insulators | substances that do not conduct heat easily |
| vacuum | empty space |
| heat | a form of energy in moving particles of matter |
| calorie | a unit of heat; the amount of heat needed to raise the temperature of 1 gram of water 1 degree Celsius |
| temperature | a measure of the average kinetic energy of the particles of a substance |
| conductors | substances that conduct heat easily |
