Unformatted text preview: (subsolar point) . Characteristics of the atmosphere. E Composition of the Atmosphere E 97% of air is in first 25 km (16 miles) E Density decreases with altitude. E Constant Gases versus Variable Gases E Constant Gases (permanent) E 97% of air is in first 25 km (16 miles) E Density decreases with altitude Remain in the same proportion in the atmosphere up to 80km regardless of atmospheric density. Nitrogen 78% ** - supports plant growth Oxygen 21% ** Inert 1% Traces...
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- Spring '10
- Geography, 1%, Equator, Subsolar Point, 16 miles