| Term | Definition |
| temperature | A measure of average kinetic energy of the particles of an object. |
| thermal expansion | The increase of the volume of a substance due to an increase of temperature. |
| absolute zero | The lowest temperature on the Kelvin Scale (0k, or zero Kelvin). Is also -273C. |
| 95 | What is 35 degrees Celcius in Fahrenhiet using the formula of F=(9/5 x C) + 32? |
| heat | The transfer of energy between 2 objects that are different temperatures. |
| thermal energy | The total kinetic energy of the paritcles that make up a substance. |
| thermal equilibrium | The contact of a warmer object and a colder object until they reach the point in which they are the same temperature, which is this point. |
| conduction | The transfer of thermal energy from one substance to another through direct contact. |
| convection | The transfer of thermal energy through a liquid or a gas. |
| radiation | The transfer of energy through matter or space, such as electromagnet waves, and visible light, like infrared waves. |
| conductor | A substance that conducts thermal energy well. |
| insulator | A substance that doesn't conduct thermal energy well. |
| specific heat capacity | The amount of energy needed to convert the temperature of 1kg of a substance by 1C. |
| states of matter | The physical forms of which a substance can exist. |
| change of state | The conversion of a substance from one physical form to another. |
| insulation | The act of something that reduces the transfer of thermal energy. |
| heat engine | A machine that uses heat to work. |
| thermal pollution | The excessive heating of a body of water. A negative effect of thermal energy. |
| molecules | What are groups of atoms called? |