| A | B |
| energy | The ability to cause change. |
| kinetic energy | Energy of motion. |
| Thermal energy | The random kinetic energy of particles in matter. |
| temperature | A measure of the average energy of motion of the particles of matter. |
| heat | Transfer of thermal energy from one piece of matter to another. |
| conduction | Transfer of thermal energy caused by particles of matter bumping into each other. |
| convection | Transfer of thermal energy by particles of a liquid or gas moving from one place to another. |
| radiation | Bundles of energy that move through matter and through empty space. |
| infrared radiation | The bundles of light energy that transfer heat. |
| fuel | A material that can burn. |
| solar energy | The energy given off by the sun. |