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Madam Madam
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6 years ago

What is the residence time of water vapor in the lower atmosphere?
  a. 2 days
  b. 5 days
  c. 10 days
  d. 20 days

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6 years ago

ANS: C
Water vapor can make up as much as 4 of air's volume. Water is able to leave the atmosphere when
it condenses into precipitation. Information can be found in the section The Atmosphere Is Composed
Mainly of Nitrogen, Oxygen, and Water Vapor.

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