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Coleman
Earth's Atmosphere
36
Science
7th Grade
04/10/2014

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Cards

Term
Atmosphere
Definition
layer of gases that surrounds a planet
Term
Where did the oxygen in the atmosphere come from?
Definition
First organisms (algae)
Term
What is the atmosphere made of?
Definition
1.Nitrogen (78%)
2.Oxygen (21%)
3.Water vapor, carbon dioxide (1%)
Term
What percent of the atmosphere is nitrogen?
Definition
78%
Term
What percent of the atmosphere is oxygen?
Definition
21%
Term
What percent of the atmosphere is water vapor/ carbon dioxide?
Definition
1%
Term
What are the four reasons why the atmosphere is important to us?
Definition
1.Provides us with oxygen
2.Stabilizes surface temperature (traps solar heat)
3.Protects us from meteors (they burn up)
4.Ozone layer protects us from harmful rays (UV- ultraviolet light)
Term
What are the layers of the atmosphere?
Definition
troposphere, stratosphere, mesosphere, thermosphere, exosphere
Term
What layer of the atmosphere do we live in?
Definition
the troposphere
Term
How do you know when you have entered a different layer of the atmosphere?
Definition
The temperature alternates changing from hotter to colder to hotter
Term
Atmospheric pressure
Definition
pressure caused by air molecules above
Term
Where is air pressure greatest?
Definition
at the surface
Term
What are two functions of the ozone layer?
Definition
-ozone (O3) layer protects us against UV rays
-absorbs energy from UV rays
Term
What destroys the ozone layer?
Definition
chlorofluorocarbon (CFCs)
Term
Where can you find CFCs/ what are they?
Definition
chemicals from aerosol sprays, refrigerators, and air conditioning units
Term
Where is an ozone hole forming?
Definition
over Antarctica
Term
True/False
Some governments have banned CFCs.
Definition
True
Term
Where does all the energy originate from?
Definition
the sun
Term
Heat
Definition
energy that flows from a hotter object to a cooler object
Term
Radiation
Definition
energy transferred by waves
Term
example of radiation
Definition
getting a sunburn
Term
Conduction
Definition
energy transferred by touch
Term
example of conduction
Definition
burning your feet on hot pavement
Term
Convection
Definition
energy transferred by currents (air or water)
Term
example of convection
Definition
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 streams and rivers
Term
Ground water
Definition
water underground
Term
True/False
Different areas of the Earth's surface heat up evenly.
Definition
False
Term
True/False
Land heats up faster than water.
Definition
True
Term
True/False
Hot air sinks/cold air rises
Definition
False
Term
Doldrums
Definition
areas near equator with little wind
Term
Jet stream
Definition
near top of troposphere
Term
Trade winds
Definition
middle latitudes
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