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Atmosphere Study Guide
Answer Key
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Atmosphere is the envelope of gases that surround the planet
Weather is the condition of the Earth’s atmosphere at a particular time and place
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What is the instruments that
measures air pressure?
Barometer
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What is Altitude?
distance above sea level
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What is the most abundant gas in the
atmosphere?
Nitrogen 78%
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Which gas is the 2nd most abundant in
the Earth’s atmosphere?
Oxygen 21%
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What percent of our atmosphere is
made up of nitrogen and oxygen?
78% + 21% =
99%
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What percent of our atmosphere is
made up of gases other than nitrogen?
100 – 78 =
22%
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What percent of our atmosphere is
made up of gases other than oxygen?
100 – 21 =
79%
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What percent of our atmosphere is
made up of gases other than nitrogen
and oxygen?
78 + 21 = 99
100 – 99=
1%
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What are the two most abundant
gases, and what percentage are they
in the atmosphere?
Nitrogen 78%
Oxygen 21%
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Scientists use this as a way of dividing
the different layers of the atmosphere
Changes in the temperature
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How is carbon dioxide produced?
Breathing
Burning Fossil Fuels Cars
Factories
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The function or purpose of the ozone
layer is:
Protects earth from UV Rays
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Layer of
Atmosphere
What happens How Temp.
Changes
Troposphere WeatherWe live here
Stratosphere Planes Fly HereOzone Layer
MesosphereProtects earth from meteoroids
Thermosphere Heat LayerDivided into 2
It gets hotter as you go up
It gets colder as you go up
It gets hotter as you go up
It gets colder as you go up
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Layer of
Thermosphere
What happens
Ionosphere
•Has Ions•Auroras Occur Here
Exosphere
Edge of AtmosphereSatellites Fly Here
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What is the relationship between air
pressure and density?
Air Pressure Increases: Density Increase,
Air pressure decreases: Density Decreases
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What happens to density when you
change altitude?
High (increase) Altitude:
LOW DENSITY (Density decreases)
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What happens to density when you
change altitude?
Low (Decrease) Altitude:
HIGH DENSITY (Density increases)
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What happens to pressure when you
change altitude?
High (increase) Altitude:
LOW AIR PRESSURE (air pressure decreases)
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What happens to pressure when you
change altitude?
Low (decrease) Altitude:
INCREASE AIR PRESSURE (GETS HIGHER)
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What makes conditions right for life
on earth?
THE ATMOSPHERE
We couldn’t live without it
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What are things we can do to help
improve air quality
Carpool
ride bikes
Walk
public transportation
filters on factories