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Bwilson13
Atmosphere
22
Science
7th Grade
04/10/2014

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Term
Atmosphere
Definition
layer of gases that surround a planet
Term
What it is made from
Definition
O2 from 1st organisms (algae)
Term
What it is made up of
Definition
Nitrogen (78%)
Oxygen (21%)
Water vapor, carbon dioxide (1%)
Term
Importance of the atmosphere
Definition
1) provides us with oxygen
2)Stabilizes surface temperture (traps solar heat)
3) Protects us from meteors (they burn up)
4) Ozone layer protects us from harmful rays (UV)
Term
The layer of the atmosphere we live in
Definition
The troposphere (closest to Eath's surface)
Term
What happens as you move from one lyer to another
Definition
The temperature changes as you move from one layer to another (colder to hotter to colder)
Term
Atmospheric pressure
Definition
pressure caused by air molecules above
- Greatest at suface
Term
How the ozone layer protects us
Definition
Ozone (O3) layer protects us against UV rays
Term
What the ozone layer does to the UV rays
Definition
Absorbs energy from UV rays
Term
HOw the ozone layer is destroyed
Definition
The ozone layer is destroyed by CFC's (found in aerosol sprays and refrigerators)
Term
Where the ozone hole forms
Definition
Over Antarctica
Term
What the government banned to protect the ozone layer
Definition
Some governments have banned CFC's
Term
Heat
Definition
energy that flows from hotter objects to a cooler object
Term
Radiation
Definition
energy transferred by waves
-getting a sunburn
Term
Conduction
Definition
energy transferred by touch
-burning your feet on hot pavement
Term
Convection
Definition
energy transferred by current (air or water)
-warm air rising to the attic
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 stream and river
Term
Ground water
Definition
water underground
Term
Where does energy come from?
Definition
All energy originates from the sun
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