Multiple choice

What percent of all water on Earth is salt water or ocean water?

  1. 70%

  2. 35%

  3. 97%

  4. 50%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Approximately 97% of Earth's total water supply is saline water found in the oceans. Only about 3% is freshwater, and most of that is locked up in glaciers and ice caps, leaving very little accessible liquid freshwater.

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