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
- Measurements of Earth’s gravitational field permit topographic, or surface, mapping of the ocean floor.
- The ocean affects the climate on our planet.
- Which of these has a greater effect on global sea level?
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