How Can a Satellite Sense the Contours of the Ocean

question 39

Multiple Choice

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

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