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Chapter 23: Change of Phase Vocabulary
Change of Phase Vocabulary
9
Physics
11th Grade
07/20/2012

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Term
phase
Definition
One of the four possible forms of matter: solid, liquid, gas, and plasma. Often called state.
Term
evaporation
Definition
The change of phase from liquid to gas that takes place at the surface of a liquid.
Term
condensation
Definition
The change of phase of a gas into a liquid; the opposite of evaporation
Term
saturated
Definition
Term applied to a substance, such as air, that contains the maximum amount of another substance, such as water vapor, at a given temperature and pressure.
Term
relative humidity
Definition
A ratio between how much water vapor is in the air and the maximum amount of water vapor that could be in the air at the same temperature.
Term
boiling
Definition
The change of phase from liquid to gas that occurs beneath the surface in the liquid. The gas forms bubbles that rise to the surface and escape.
Term
freezing
Definition
Change in phase from liquid to solid.
Term
regelation
Definition
The phenomenon of ice melting under pressure and freezing again when the pressure is reduced.
Term
heat pump
Definition
A device that moves heat.
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