Question

what happens to the temperature of the mantle material as it moves away from a mid-ocean ridge?
a warms
b sinks
c rises
d cools

Explanation:

Mid - ocean ridges are areas where mantle material rises due to convection. As the mantle material (like magma) moves away from the mid - ocean ridge, it loses heat to the surrounding cooler environment (such as the ocean water and the crust). So, the temperature of the mantle material decreases, meaning it cools. Option a is incorrect because it doesn't warm as it moves away from the heat source at the ridge. Option b refers to the movement of the material (sinking is a part of convection, but the question is about temperature), and option c is incorrect as the material rises at the ridge, not as it moves away.

Answer:

d. Cools