ASTR 101 Lecture Notes - Lecture 9: Terrestrial Planet, Sulfur Dioxide, Carbonate Rock
13 Dec 2016
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This is where nitrogen came into dominance in the atmosphere. Bubble out when molten rock comes to surface; then forms into atmosphere. With the doppler effect, think of it going toward and away from you; when it is going sideways in relation to you, nothing will happen. The earliest earth was too hot for water to be present. As the earth cooled, water could start to rain out of the atmosphere. At first, earth was a big molten ball of rock. Water vapor, carbon dioxide, nitrogen, helium methane, and hydrogen are present in the planetesimals that form terrestrial planets. Mixed in with the rock; in a solution like bubbles in soda. The things that were lighter (hydrogen, helium) tended to float up. Things that were heavier (water vapor) tended to sink and float around earth. Hotter - more water vapor - more rain - more acid rock erosion - more carbonate rock.
