8. The reason the Earth is able to have plate tectonics is because
a. the asthenosphere is soft and gooey so the plates can move around on top of it.
b. the lithosphere is brittle so it has been able to break apart to form the plates.
c. convection in the mantle provides a driving force to move the plates around.
d. all of the above
a. the asthenosphere is soft and gooey so the plates can move around on top of it.
b. the lithosphere is brittle so it has been able to break apart to form the plates.
c. convection in the mantle provides a driving force to move the plates around.
d. all of the above
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Answer:
D.All of the above
Tectonic plates are able to move because the Earth's lithosphere has greater mechanical strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection; that is, the slow creeping motion of Earth's solid mantle.
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