Question

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How does convection in the asthenosphere contribute to the movement of tectonic plates?

Answer 1

Convection helps move the plates in the direction they already are. at the mid ocean ridge where the plate starts its movement the heat source rises underneath than moves in the direction with the plate helping it move along eventually the material cools and begins to descend which can occur where the plate subduction is happening the drag from the subduction in addition to the plates weight and the convection currents downward direction to help drag/pull the plate back down.
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