On either side of a mid-ocean ridge,the lithosphere begins to
A) rise because it thickens away from the ridge.
B) rise because it becomes buoyant.
C) sink because it cools and contracts.
D) sink because convection pulls it downward.

Question

Quizplus · Accepted Answer

As the lithosphere moves away from the mid-ocean ridge, it cools and contracts. This process increases its density, causing it to sink relative to the surrounding, warmer, and less dense asthenosphere. This is a fundamental aspect of plate tectonics and contributes to the process of seafloor spreading.

On Either Side of a Mid-Ocean Ridge,the Lithosphere Begins to