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Chapter 18 Prentice Hall Earth Science

ch 18
STUDY
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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