How can a satellite sense the contours of the ocean bottom from space?
A)By shining a laser through the ocean to see the bottom
B)By using radar to sense the height of the sea surface over submerged features
C)By using sonar to measure ocean bottom contours directly
D)By sensing changes in gravity as it flies over trenches and mountain ranges

Question

Quizplus · Accepted Answer

Satellites use a technique called radar altimetry to measure the height of the sea surface. This allows them to sense the bumps and dips of the ocean bottom indirectly, by detecting variations in the sea surface height over submerged features.

How Can a Satellite Sense the Contours of the Ocean