| A | B |
| Conduction | The transfer of energy through matter by direct contact of particles. |
| Fluid | Any material that flows. |
| Convection | Transfer of energy by the bulk movement of matter. |
| Radiation | Transfer of energy in the form of waves. |
| Insulator | Materials which do not allow heat to move easily through them. |
| Radiator | Device with a large surface area designed to heat the air near it by conduction. |
| Solar Energy | Energy from the sun. |
| Solar Collector | Devices that absorb radiant energy from the sun. |
| Ocean Thermal Energy Conversion | Process that uses heat engines to convert differences in ocean water temperature into mechanical energy to drive turbines. |
| Heat Engine | Device that converts thermal energy into mechanical energy. |
| Combustion | Rapid burning. |
| Internal Combustion Engine | Fuel burns inside the engine in chambers called cylinders. |
| External Combustion Engine | Fuel is burned outside the engine. |
| Heat Mover | Device that removes thermal energy from one location and transfers it to another location at a different temperature. |