Chapter 18 Prentice Hall Earth Science

24 terms by fischerthegoalie 

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ch 18

Precipitation

any form of water that falls from a cloud

Latent Heat

heat absorbed or given off during a change of phase at a constant temperature

Evaporation

the process of changing a liquid to gas

Condensation

when water vapor changes to liquid

Sublimation

conversion of a solid to a gas without passing through the liquid state

Deposition

the conversion of a vapor directly to a solid

Humidity

the general term for the amount of water vapor in the air

Saturated

being the most concentrated solution possible at a given temperature

Relative Humidity

a ratio of the airs actual water-vapor air can hold at the temperature and pressure

Dew Point

the temperature to which a parcel of air would need to be cooled to reach saturation

Hygrometer

measures humidity

Dry Adiabatic Rate

10C for every 1000m or 5.5F for every 1000ft (Temp. change for unsaturated air parcels)

Wet Adiabatic Rate

the slower rate of cooling caused by the addition of latent heat released

Orographic Lifting

cloud formation that occurs when warm moist air is forced to rise up the side of a mountain

Front

produces when warm air and cool air collide

Temperature Inversion

when ai increases with height

Condensation Nuclei

Microscopic particles on which water vapor condenses to form cloud droplets.

Cirrus Clouds

high, white, and thin clouds

Cumulus Clouds

clouds that consist of rounded individual cloud masses

Stratus

sheets of clouds that cover most of the sky

Bergeron Processs

Ice crystals grow at the expense of water droplets

Supercooled

water in a liquid state below 32 degrees celcius

Supersaturated

solution has more solute than it normally can hold at that temperature

Collision-Coalescence Process

mechanism that forms raindrops

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