How far down do downwelling and upwelling reach in the Earth?
A) to the lithosphere
B) to the asthenosphere
C) to the transition zone
D) to the lower mantle

Question

Quizplus · Accepted Answer

Downwelling and upwelling can reach down to the lower mantle, which is the layer of the Earth between the transition zone and the outer core. This is because these processes involve the movement of material within the mantle, which extends down to a depth of about 2,900 kilometers.

How Far Down Do Downwelling and Upwelling Reach in the Earth