| A | B |
|---|
| absolute zero | the temperature at which all molecular motion stops |
| phase change | physical change of matter from one phase to another |
| freezing point | the temperature at which a liquid turns into a solid |
| melting point | temperature at which a solid turns into a liquid |
| boiling point | temperature at which a liquid turns into a gas |
| conduction | the movement of heat energy from direct contact |
| convection | the flow of energy that occurs when a warm liquid or gas rises |
| radiation | the movement of energy by waves |
| evaporation | the change from a liquid to a gas |
| condensation | the change from a gas to a liquid |
| heat | from of energy caused by the movement of molecules |
| temperature | a measure of how fast atoms or molecules are moving |
| thermometer | instrument used to measure temperature |
| Fahrenheit | temperature scale in which water freezes at 32 and boils at 212 |
| Celsius | temperature scale at which water freezes at 0 and boils at 212 |
| conductor | a material through which heat travels easily |
| insulator | materal that does not conduct heat well |
| Kelvin | temperature scale at which water freezes at 273 and boils at 373 |
| specific heat | amount of heat need to change a solid to a liquid |
| gamma rays | waves that transfer heat by radiation |
| high to low | direction of heat flow |
| calorie | amount of heat need to change the temperature of 1 gram of water 1 degree Celsius |
| copper | best conductor of heat |
