| A | B |
| heat | the flow of thermal energy from one object to another as a result of a difference in temperature |
| temperature | a measure of how hot something is |
| thermometer | an instrument used to measure temperature |
| scale of temperature | numbers which describe how hot or cold something is |
| Celsius scale | the metric scale used to measure temperature |
| expand / expansion | to get larger |
| contract / contraction | to get smaller |
| *thermochromic tape | a strip that indicates temperature through changes in colo |
| *thermocouple | an electric device for measuring temperature; a temperature sensor |
| *mercury thermometer | thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in °C or °F |