The Mid-Oceanic Ridge rises high above the surrounding sea floor because new lithosphere forming at the ridge axis is ____ and of relatively ____ density.
A) hot; low
B) hot; high
C) cool; high
D) cool; low

Question

Quizplus · Accepted Answer

The Mid-Oceanic Ridge is elevated because the new lithosphere forming at the ridge axis is hot and therefore less dense than the cooler, older lithosphere away from the ridge. This lower density causes it to rise relative to its surroundings.

The Mid-Oceanic Ridge Rises High Above the Surrounding Sea Floor