Earth’s Interior.

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Presentation transcript:

Earth’s Interior

- Earth is layered - layering is based on:. a) composition or - Earth is layered - layering is based on: a) composition or b) state (s, l, g)

- layering based on composition

- layering based on state

upper layers

History of Plate Tectonics - Alfred Wegener (1920’s)

History of Plate Tectonics - Alfred Wegener (1920’s) - Continental Drift Theory

History of Plate Tectonics - Alfred Wegener (1920’s) - Continental Drift Theory - stated that continents plowed through the ocean floor

History of Plate Tectonics - Alfred Wegener (1920’s) - Continental Drift Theory - stated that continents plowed through the ocean floor - quickly disproven

History of Plate Tectonics - new technology after WWII allowed for mapping of ocean floor - new discoveries led to the Theory of Plate Tectonics

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