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What do scientists think cause the movement of crustal plates

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User Deeenes
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The movement of the molten rocks underneath the plates

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User Dan Cornilescu
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Scientists think convection currents are what cause earth's plates to move. A convection current is caused by differences in temperature. Mantle material close to earth's core is very hot. Mantle material near the lithosphere is cooler.
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User Rob Sutherland
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