Chp10-11-12 - Next About this document SCCC 115 Homework 6...

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Next: About this document . .. SCCC 115 Homework 6 - Due 3 Nov. 2005 Prof. Christina Lacey R&D: 10-19, 10-20, 11-8, 12-1, 12-7 P: 11-5, 12-9 Since Mars has an atmosphere and it is composed mostly of a a greenhouse gas, why isn't there a significant greenhouse effect to warm its surface? While Mars' atmosphere is mostly CO , a greenhouse gas, there isn't enough atmosphere to create an effective insulating layer to hold in the trapped IR radiation. Compare and contrast the evolution of the atmosphere of Mars, Venus, and Earth. All three planets have secondary atmospheres produced by volcanoes. Venus, which is closest to the Sun, was too warm for liquid water to form. Without liquid water, the CO could not settle out of the atmosphere and dissolve into the oceans. So Venus became a victim of the runaway greenhouse effect and became warm with a very dense, highly insulating atmosphere. The H O in the atmosphere was destroyed by UV sunlight. Earth was far enough from the Sun for liquid water to form and precipitate out into the
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Chp10-11-12 - Next About this document SCCC 115 Homework 6...

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