PPL » Human Factors » The Atmosphere
10.6 The Atmosphere
10.6.2 State the gases that make up the atmosphere.
The atmosphere is made up of 3 main gases:
Nitrogen - 78%
Oxygen - 21%
Trace Gases - 1%
10.6.4 Describe the variation of pressure as altitude increases.
As altitude increases, the atmospheric pressure decreases.
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