Exploring Earth's Atmosphere
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Questions and Answers

Which gas makes up the largest percentage of dry air by number of molecules?

  • Nitrogen (correct)
  • Oxygen
  • Argon
  • Carbon dioxide

What is the percentage of oxygen in dry air by number of molecules?

  • 78.08%
  • 20.95% (correct)
  • 0.93%
  • 0.04%

What is the percentage of carbon dioxide in dry air by number of molecules?

  • 0.93%
  • 0.04% (correct)
  • 20.95%
  • 78.08%

What is the average percentage of water vapor in air at sea level?

<p>1% (D)</p> Signup and view all the answers

What is the second most abundant gas in dry air by number of molecules?

<p>Argon (B)</p> Signup and view all the answers

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