Multiple choice

Once evaporated, about how much does a water molecule stay in the air?

  1. 10 days

  2. 20 days

  3. 30 days

  4. 40 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The average residence time of a water molecule in the atmosphere is about 9 to 10 days. After this brief period, it condenses and falls back to Earth as precipitation as part of the global water cycle.

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