[GEO 110] - Final Exam Guide - Ultimate 29 pages long Study Guide!

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Part 3: mission to the surface of earth. Where does water come from(active research: formation of planets or, icy comets, hydrogen is a main element in water. Two isotopes 1h and 2d: h isotopes are a fingerprint for the source of our water. Why are we the only planet with oceans: optimal distance from sun 0-100 degrees c, earth is large so gravity is strong, earth"s rocks are good containers for water. What is the atmosphere: outermost layer of earth. How old is atmosphere: fe oxidizes. Banded fe formation: sed rock deposited when the atmosphere became o rich (2 bil) How do we know about the ocean: polynesians were first ocean explorers(4000 years ago) Migration routes across the pacific: oceanography is a young science (relative to other sciences) First work in sci oceanography was in 1872 by the challenger. What do we know about the ocean: 5major oceans. Lots of smaller seas and gulfs: echosounding.

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