| Term | Definition |
|---|
| Temperature | The measure of the average kinetic energy of the particles in a substance. |
| Fahrenheit scale | The temperature scale on which 32 and 212 are the temperatures at which water freezes and boils. |
| Celsius scale | The temperature scale on which zero and 100 are the temperatures at which water freezes and boils. |
| Kelvin scale | The temperature on which zero is the temperature at which no more energy can be removed from matter. |
| Absolute zero | The temperature at which no more energy can be removed from matter. |
| Heat | Thermal energy that Is transferred from one substance to another. |
| Conduction | The transfer of heat between particles within a substance. |
| Convection | The transfer of heat by the movement of currents within a fluid. |
| Convection Current | A current caused by the rising of heated fluid and sinking of cooled fluid. |
| Radiation | The transfer of energy by electromagnetic waves. |
| Conductor | A material that easily transfers heat between its particles. |
| Insulator | A material that does not easily transfer heat between its particles. |
| Specific heat | The amount of heat required to raise the temperature of one kilogram of a substance by one Kelvin. |
| States | The three forms (solid, liquid, and gas) in which matter exists. |
| Change of state | The physical change of matter from one state to another. |
| Melting | change from the solid to the liquid form of matter. |
| Melting point | The temperature at which a substance melts. |
| Freezing | The change from the liquid to the solid form of matter. |
| Freezing point | The temperature at which a substance freezes. |
| Vaporization | The change from the liquid to the gaseous form of matter. |
| Evaporation | Vaporization that occurs at the surface of a liquid. |
| Boiling | Vaporization that occurs on and below the surface of a liquid. |
| Boiling point | The temperature at which a liquid substance boils. |
| Condensation | The change from the gaseous to the liquid form of matter. |
| Thermal Expansion | The expansion of matter when it is heated. |
| Thermostat | A device that regulates temperature. |
| Bimetallic strip | A strip made of two different metals that expand at different rates. |
| Heat engine | A device that converts thermal energy into mechanical energy. |
| Combustion | The process of burning a fuel to produce thermal energy. |
| External Combustion Engine | An engine powered by fuel burned outside the engine. |
| Internal Combustion Engine | An engine that burns fuel inside cylinders within the engine. |
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