The nature of heat/ Thermal energy and States of Matter
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22 terms
Terms | Definitions |
|---|---|
 Heat | The movement if thermal energy from a substance at a higher temperature to another at a lower temperature. It is thermal energy moving from a warmer object to a cooler object. |
| Conduction | The transfer of heat between particles within a substance, |
| Convection | The movement that transfers heat within the water. |
| Convection currents | Currents caused by the rising of heated fluid and sinking of cooled fluid. |
| Radiation | The transfer of energy by electromagnetic waves. |
| Conductor | A material that conducts heat well. |
| Insulator | A material that doesn't conduct heat well. |
| 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 from one state of matter to another. |
| Melting | *The change of state from a solid to a liquid. |
| Melting point | The temperature at which a solid changes to a liquid. |
| Freezing | The change of state from a liquid to a solid. Freezing occurs when a substance looses thermal energy. |
| Freezing point | The temperature at which a substance changes from a liquid to a solid. |
| Vaporization | The process by which matter changes from the liquid to the gas state. |
| 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 boils. |
| Condensation | A change from the gas state to a liquid state. |
| Thermal expansion | The expanding of matter when it is heated. |
| Thermostats | A device that regulates heat. A heat-regulating device. Thermal expansion are used in thermostats. |
| Bimetallic strips | A strip made two different metals that expand at different rates. |
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