Lithospheric plates move on the Earth's surface because ____.
a. warm mantle ascends at ridges and cool mantle descends at subduction zones
b. convection occurs only in the asthenosphere
c. cool mantle ascends at ridges and warm mantle descends at subduction zones
d. warm mantle ascends at ridges and cool mantle descends at subduction zones AND convection occurs only in the asthenosphere
e. convection occurs only in the asthenosphere AND cool mantle ascends at ridges and warm mantle descends at subduction zones
a. warm mantle ascends at ridges and cool mantle descends at subduction zones
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Indicate whether the statement is true or false.
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