1
Plate tectonics is the unifying theory of Earth science and explains many of the major features of how our planet operates. It accounts for Earth's history including the distribution of life and past climate change.
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2
An early continental drift model proposed that mantle convection can produce continental movement and new plate formation.
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3
The breakup of a supercontinent into several smaller continents explains the distribution of fossil and geologic evidence.
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4
Reconstructing past continental plate movements reveals the island of Spitsbergen was tropical 500 million years ago.
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5
An early model of continental drift proposed that parts of continental plates can sink into the mantle, allowing for movement.
Grade Level   6 7 8 9 10 11 12
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6
African rift valleys were formed by the separation of tectonic plates. Water flows down to the valley floors, creating rivers and lakes.
Grade Level   10 11 12
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