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chapter 20

humidity

TermDefinition
latent heat Latent heat is released or absorbed when water changes from one state to another.
sublimation when a solid turns directly into a gas.
dew point When air reaches the dew point, the rate of condensation equals the rate of evaporation. Below the dew point, net condensation or deposition causes dew or frost to form.
Absolute humidity Absolute humidity is the mass of water vapor contained in a given volume of air.
relative humidity Relative humidity is a ratio of the actual amount of water vapor in the air to the amount of water vapor needed to reach saturation.
cloud Clouds form when water vapor cools and condenses on condensation nuclei.
condensation nucleus Clouds form when water vapor cools and condenses on condensation nuclei.
adiabatic cooling Water vapor can cool and condense by adiabatic cooling, by the mixing of two bodies of moist air that have different temperatures
advective cooling by the lifting of air, and by advective cooling
stratus cloud gray cloud that has a flat, uniform base and that commonly forms at very low altitudes
cumulus clouds low-level, billowy cloud that commonly has a top that resembles cotton balls and a dark bottom
cirrus cloud feathery cloud that is composed of ice crystals and that has the highest altitude of any cloud in the sky
fog Fog forms when air near Earth’s surface is chilled below the dew point
Created by: caden omron
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