What Causes the Earth Plates to Move?

Answer

The plates in the earth move because of the lava inside of the earth. As the lava cools it shrinks and as it heats up it expands causing the plates to move.
Q&A Related to "What Causes the Earth Plates to Move?"
Convection currents inside Earth provide the mechanism for plate motion.
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Most scientists believe that gravity and heat from the
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Convection of the mantle due to Earth's internal heat. This causes the crust to tear apart in some areas and subduct in others.
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The similar fossil records found in South Africa and South America, Europe and North America and Madagascar and India supported Wegener's hypothesis that these landmasses were once
http://www.ehow.com/info_8391207_plate-changes-cau...
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