Page 114 - Science Course 1 (Book 2)
P. 114
Mo9-L3c: What are the Layers of the Atmosphere?
Air Pressure and Altitude
Gravity pulls the
atmosphere toward
Earth, creating air
pressure.
At higher altitudes,
the air is less dense
and air pressure is
lower.
At lower altitudes, Increasing Altitude
the air is denser and
air pressure is higher.
Temperature changes in different ways as altitude
increases in the different layers of the atmosphere.
In the troposphere, temperature decreases as alti-
tude increases.
In the stratosphere, temperature increases as alti-
tude increases because of the high concentration of
ozone.
In the mesosphere, as altitude increases, tempera-
ture again decreases.
In the thermosphere and exosphere, temperatures
increase as altitude increases.
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