Multiple choice

The ocean covers about how much of Earth’s surface?

  1. 30 percent

  2. 50 percent

  3. 70 percent

  4. 80 percent
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ocean covers approximately 71 percent of the Earth's surface, leaving about 29 percent as land. This is why Earth is often referred to as the 'blue planet'.

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