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Science
Moisture, clouds, and precipitation
23
Science
9th Grade
01/17/2011

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Term
Precipitation
Definition
any form of water that falls from a cloud
Term
latent heat
Definition
latent means-hidden
Term
evaporation
Definition
the process of changing a liquid to a gass
Term
condensation
Definition
the opposite process where water vapor changes to the liquid stat
Term
sublimation
Definition
the conversion of a solid directly to a gas, without passing the liquid state
Term
deposition
Definition
the conversion of a vapor directly to a solid
Term
humidity
Definition
the general term for the amount of water vapor in the air
Term
saturated
Definition
the number of vapor molecules returning to the survace will balance the number leaving
Term
dew point
Definition
the temperature to which a parcel of air would need to be cooled to reach saturation
Term
hygrometer
Definition
realative humidity is measure using this
Term
dry adiabatic rate
Definition
rate of cooling or heating applies only to unsaturated air
Term
wet adiabatic rate
Definition
slower rate of cooling caused by the addition of latent heat
Term
orographic lifting
Definition
elevated terrains, such as mountains act as barriers to air flow
Term
front
Definition
when masses of warm and cold air collide
Term
temperature inversion
Definition
the most stable conditions when air temperature increases with height
Term
condensation nuclei
Definition
serve as surfaces for water-vapor condensation
Term
cirrus
Definition
high white and thin clouds
Term
cumulus
Definition
clouds consisting of rounded individual cloud masses
Term
stratus
Definition
best described as sheets or layers that cover much or all of the sky
Term
fog
Definition
a cloud with its base at or very near the ground
Term
supercooled
Definition
water in the liquid state below 0 degrees celcius
Term
supersaturated
Definition
when air is saturated with respect to water
Term
collision-coalescence process
Definition
in warm clouds, the mechanism that forms raindrops
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