Sea-floor spreading implies that sea-floor rocks should be ______________.
A) the same age throughout
B) youngest on the crest of mid-ocean ridges
C) younger as water become colder
D) younger toward the trench
E) youngest on the continental shelf

Question

Quizplus · Accepted Answer

Sea-floor spreading is the process by which new oceanic crust is formed through volcanic activity and then moves away from the mid-ocean ridge. As a result, the rocks on the ocean floor should be youngest on the crest of mid-ocean ridges and oldest near the edges of the continents. Therefore, choice B is correct.

Sea-Floor Spreading Implies That Sea-Floor Rocks Should Be ______________