Most of the ocean floor is made up of
A) deep-ocean trenches (8 to 11 km below sea level).
B) abyssal plains (4 to 5 km below sea level).
C) mid-ocean ridges (less than 2.5 km below sea level).
D) Elevations of the sea floor are nearly uniformly distributed from sea level to 11 km depth.

Question

Quizplus · Accepted Answer

Abyssal plains make up the majority of the ocean floor, covering over 50% of the total area. They are relatively flat regions of the deep ocean that lie at depths of 4 to 5 km below sea level. Deep-ocean trenches are narrow depressions in the ocean floor and are typically located near subduction zones, while mid-ocean ridges are underwater mountain ranges that form at divergent plate boundaries. Elevations of the sea floor are not uniformly distributed and vary greatly in depth.

Most of the Ocean Floor Is Made Up of