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chapter 20
| Term | Definition |
|---|---|
| latent heat | The heat energy that is absorbed or released by a substance during a phase change |
| sublimation | the process by which a solid changes directly into a gas is called |
| dew point | The temperature at which the condensation rate equals the evaporation rate is called |
| absolute humidity | The mass of water vapor contained in a given volume of air. |
| relative humidity | a measure of how close the air is to reaching the dew point |
| cloud | a collection of small water droplets or ice crystals in the air |
| condensation nucleus | uspended particles that provide the surfaces necessary for water vapor to condense are called |
| adiabatic cooling | The process by which the temperature of a mass of air decreases as the air rises and expands is called |
| advective cooling | the process by which the temperature of an air mass decreases as the air mass moves over a cold surface, such as a cold ocean or land surface. |
| stratus cloud | Clouds that have a flat, uniform base and that begin to form at very low altitudes are called |
| cumulus cloud | Low-altitude, billowy clouds that commonly have a top that resembles cotton balls and a dark bottom are called |
| cirrus cloud | Feathery clouds that are composed of ice crystals and that have the highest altitude of any cloud in the sky are |
| fog | the result of the condensation of water vapor in the air |
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