The Ocean
Looking at our Earth from space, it is obvious that we live on a water planet. Ocean covers over 70 percent of Earth's surface and contains about 97 percent of Earth's surface water. How much do you know about our ocean?
Sample questions
- NASA has been measuring sea surface height from space since 1992. Over that period, average global sea level has:
- Which of these has a greater effect on global sea level?
- Most of the Earth's water is found in:
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