Lecture 4 F 2010 - Lecture 4, Chapter 3: Earths Modern...

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Earth’s Modern Atmosphere Atmosphere: The thin veil of gases surrounding Earth, which forms a protective boundary between outer space and the biosphere It extends about _______________ from the Earth’s surface Above 300 miles is the exosphere : Air Pressure: _______________compresses air. Air pressure averages nearly ___________ pounds per square inch at sea level. Air is denser (pressure is higher) at the surface than it is higher up. Why aren’t we crushed by air pressure? Atmospheric pressure is measured in _____________________ here in the US. Which are FALSE? A. Air pressure is defined as: the weight of the atmosphere. B. We are not crushed by air pressure because we have a counterbalancing force within us, pressing out. C. Gravity compresses air, so air is denser at the surface than it is higher up. D. The air pressure is nearly 200 pounds per square inch at sea level. E. Atmospheric pressure is measured in millibars here in the U.S. F. Above 300 miles is the exosphere; below that is the earth’s atmosphere G. The higher you go, the more molecules there are in the air, so the more oxygen you get with each breath. Falling through Space In 1961, Kittinger went up 19.5 miles and jumped out of a helium filled balloon. Why was the sky black? Why didn’t he hear anything? Why didn’t his air suit flutter in the wind? Which is FALSE about Kittinger’s jump from space?. A. Although it was daytime, the sky was almost black, because there were no air molecules to reflect the light. B. There was a huge rushing noise as he hurtled through space.
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This note was uploaded on 02/01/2011 for the course GEOG 1112 taught by Professor Kumar during the Fall '08 term at Georgia State University, Atlanta.

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Lecture 4 F 2010 - Lecture 4, Chapter 3: Earths Modern...

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