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10. plate tectonics_06(2)

10. plate tectonics_06(2) - OBJECTIVES FOR CONTINENTAL...

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OBJECTIVES FOR CONTINENTAL DRIFT AND PLATE TECTONICS 1) What kind of rock is at the summit of Mt. Everest? Deep marine Limestone 2) What is the name of the person who came up with the theory of Continental Drift? Alfred Wegener 3) What evidence was there for Continental Drift? All the edges of the continents fit together like a puzzle. Mineral and rock belts that match across the continents Mountain belts Fossils that match on either side 4) What is the name of the giant supercontinent that Wegener postulated existed in the past, when do we believe it began to break apart, and what are the names of the two main pieces it broke into? Pangaea 240 million years ago Northern: Laurasia Southern: Gondwanaland 5) Why didn’t the scientific community accept Continental Drift at the time it was proposed? No good mechanism
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6) Who was the person who came up with the theory of sea-floor spreading and what was the initial evidence for this hypothesis? Ridges running down the center of the ocean, volcanic islands, Guyots: flat
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