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The Theory of Continental Drift
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1. Continental Drift Theory
a. Proposed by Alfred Wegener in 1912 b. 250 million years ago, all of the continents were combined into one super-continent called “Pangaea” c. The continents gradually drifted apart to where they are today
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2. Evidence of Continental Drift
a. Puzzle pieces continents fit together like a jigsaw puzzle
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2. Evidence continued… b. Fossil evidence Identical plant and animal fossils found on the coastlines of different continents
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2. Evidence continued…. c. Rock patterns Same rock patterns found in South America, India, Africa, Antarctica and Australia
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2. Still more evidence…. d. Climate evidence Tropical plant remains (coal deposits formed in warm climates) found in Antarctica (now a cold climate) e. Glaciation in Africa, South America, India, and Australia during the same time
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3. What was the main reason scientists rejected Wegener’s theory of continental drift?
a. Wegener could not explain the force that was making the continents move. b. He didn’t have a good hypothesis!
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Summary: What idea from the movie suggested a mechanism for moving continents?
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