Astronomy 10 10.16.06 - Astronomy 10 Earth's Atmosphere...

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Astronomy 10 Earth’s Atmosphere 10/16/06 Nitrogen atmospheres only happen in two places: Earth and Titan Earth’s Atmosphere: o Oxygen is only about 20% of Earth’s atmosphere o Earth’s first atmosphere was made of Hydrogen and Helium when it first formed o Over the first billion years the Hydrogen and the Helium left Earth because Earth was not strong enough to hold onto the gases o The Earth was going though extreme Volcanic and Tectonic changes The gases emitted from these changes produced a lot of oxides The atmosphere did not stay like that because of the biochemistry that was happening in the warm ocean The things that photosynthesized learned how to turn the oxides in the atmosphere into substances that they could live on The formed hydrocarbons and carbohydrates and they spat out oxygen as a waste material Life on Earth changed Earth’s atmosphere One major influence in the ratio of Oxygen to Carbon dioxide are amount
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This note was uploaded on 04/01/2008 for the course ASTRO 10 taught by Professor Norm during the Fall '06 term at University of California, Berkeley.

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Astronomy 10 10.16.06 - Astronomy 10 Earth's Atmosphere...

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