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PS8 Chapter14

Thermal Energy

TermDefinition
Temperature a measure of the average energy of motion of the particles of a substance
Fahrenheit scale the temperature scale on which water freezes at 32 degrees and boils at 212 degrees
Celsius scale the temperature scale on which water freezes at 0 degrees and boils at 100 degrees
Kelvin scale the temperature scale 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 matter at a higher temperature to matter at a lower temperature
Specific heat – the amount of heat required to raise the temperature of 1 kilogram of a material by 1 kelvin
Conduction the transfer of heat from one particle of matter to another
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 through which charges can easily flow
Insulator a material through which charges cannot easily flow
State one of the three forms – solid, liquid, or gas – in which matter exists
Change of state the physical change of matter from one state to another
Melting the change from the solid to the liquid state of matter
Freezing the change from the liquid to the solid state of matter
Evaporation process that occurs when vaporization takes place only on the surface of a liquid
Boiling the process that occurs when vaporization takes place inside a liquid as well as on the surface
Condensation the change from the gaseous to the liquid state of matter
Thermal expansion the expansion of matter when it is heated
Heat engine a device that converts thermal energy into mechanical energy
External combustion engine an engine powered by fuel burned outside the energy
Internal combustion engine an engine that burns fuel inside cylinders within the engine
Refrigerant the substance that absorbs and releases heat in a cooling system
Created by: KerriReynolds