| A | B |
| density | amount of mass per unit volume |
| Celsius temperature scale | 0o water freezes 100o water boils |
| Kelvin | SI unit for temperature based on theoretical absolute zero |
| 0 K | absolute zero |
| absolute zero | temperature at which all molecular motion is stopped |
| temperature | measure of the hotness or coldness of matter |
| temperature | measures the intensity of energy of the particles in a substance |
| heat | form of energy transferred between matter because of temperature differences |
| joule | SI unit of energy |
| calorie | second SI unit of energy equal to 4.184 joules |
| Calorie | used to measure energy in food equal to 1,000 calories |
| kilocalorie | equivalent to 1,000 calories or 1 Calorie |
| specific heat | amount of heat needed to raise 1 gram of a substance 1 degree C |