| A | B |
| The temperature scale on which 32 and 212 are the temperatures at which water freezes and boils. | Fahrenheit scale |
| The temperature scale on which zero is the tempurature at which no more energy be removed from matter. | Kelvin scale |
| The temperature scale on which zero and 100 are the temperature at which water freezes and boils | Celsius scale |
| The temperature at which no more energy can be removed from matter | Absolute zero |
| The movement of thermal energy from one substance to another | Heat |
| The transfer of thermal energy between particles within a substance | Conduction |
| The transfer of thermal energy by the movement of currents within a fluid | Convection |
| A current caused by the rising of heated fluid and sinking of cooled fluid | Convection current |
| The transfer of energy by electromagnetic waves | Radiation |
| A material that does not easily transfer thermal energy or electric current between its particles | Insulator |
| The amount of thermal energy required to raise the temperature of one kilogram of a substance by one kelvin | Specific heat |
| The three forms (solid, liquid, and gas) in which matter exists | States |
| The physical change of matter from one state to another | Change of state |
| The temperature at which a substance changes from a liquid to a solid | Freezing point |
| The expansion of matter when it is heated | Thermal expansion |
| A device that regulates temperature | Thermostat |
| A strip made of two different metals that expand at different rates | Bimetallic strip |
| A device that converts thermal energy into mechanical energy | Heat engine |
| An engine powered by fuel burned outside the engine | External combustion |
| An engine that burns fuel inside cylinders within the engine | Internal combustion |