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Hines
Atmosphere
28
Science
7th Grade
04/09/2014

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Term
atmosphere
Definition
layer of gases that surround a planet
Term
O2 from 1st organisms
Definition
algae
Term
atmosphere made up of
Definition
nitrogen (78%)
oxygen (21%)
water vapor, carbon dioxide (1%)
Term
importance of atmosphere
Definition
provides us with oxygen
Term
Definition
stabilizes surface temperature
Term
Definition
protects us from meteors
Term
Definition
ozone layer protects us from harmful U.V. rays
Term
layers of atmosphere
Definition
live in troposphere (closest to earth)
Term
Definition
temperature changes as you move one layer to another
Term
atmospheric pressure
Definition
pressure caused by air molecules above (greatest at surface)
Term
ozone layer
Definition
Term
ozone layer protects us against U.V. rays
Definition
Term
absorbs energy from U.V. rays
Definition
Term
layer destroyed by CFCs (found in aerosol sprays and refrigerators)
Definition
Term
ozone hole forming over antartica
Definition
Term
some govt's have banned CFCs
Definition
Term
heat
Definition
energy that flows from a hotter object to a cooler object
Term
radiation
Definition
energy transferred by waves
Term
conduction
Definition
energy transferred by currents (air or water)
Term
evaporation
Definition
when water changes to water vapor
Term
condensation
Definition
when water vapor changes to water
Term
precipitation
Definition
when water droplets fall from clouds
Term
run-off
Definition
water in streams and rivers
Term
ground water
Definition
water underground
Term
atmospheric pressure
Definition
pressure caused by air molecules above
Term
doldrums
Definition
areas near equator with little wind
Term
jet stream
Definition
near top of troposhpere
Term
trade winds
Definition
middle latitudes
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