| A | B |
| thermal energy | total energy of motion in the molecules of a substance |
| effectively | producing the desired effect; working properly |
| Fahrenheit | temperature scale used in the United States |
| convection | transfer of heat by the movement of a fluid (currents) |
| conduction | transfer of heat from one substance to another substance that it is touching |
| Celsius | metric temperature scale |
| denser | having move mass in a given volume than another object |
| axis | a line around which something can rotate |
| molecules | two or more atoms joined together acting as a single unit |
| incandescent | glowing brightly |
| mercury | a heavy metallic element that is liquid at room temperature |
| inferring | explaining an observation |
| transferring | moving from one place to another |
| radiation | transfer of energy through space by electromagnetic waves |
| thermometer | a device used to measure air temperature |
| contract | get smaller |