| A | B |
|---|
| energy | the ability to cause change |
| thermal energy | the energy of particles moving in matter |
| heat | the movement of thermal energy from one place to another |
| conductor | a material in which thermal energy moves easily |
| insulator | a material in which thermal energy does not move easily |
| thermometer | a tool used to measure how hot or cold something is |
| expand | to take up more space |
| contract | to take up less space |
