Which of the following statements about the mantle is TRUE?
A)The lithospheric mantle moves independently of the overlying plates.
B)The asthenosphere and lower mantle are made of roughly the same composition material, only it behaves differently in the asthenosphere.
C)The lower mantle is significantly less dense than the upper mantle.
D)The upper mantle is liquid, but the lower mantle is solid.

Question

Quizplus · Accepted Answer

The asthenosphere and lower mantle are made of roughly the same composition material (peridotite), only it behaves differently in the asthenosphere due to the higher temperature and pressure. The other statements are not true - the lithospheric mantle does not move independently of the overlying plates, the lower mantle is actually denser than the upper mantle, and while the asthenosphere is partially molten, the upper and lower mantle are both solid.

Which of the Following Statements About the Mantle Is TRUE