Atmospheric Exploration

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Questions and Answers

Which gas makes up the largest percentage of dry air by mole fraction?

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

What is the average amount of water vapor in the atmosphere at sea level?

  • 5%
  • 0.4%
  • 1% (correct)
  • 2%

What is the approximate mass of the Earth's atmosphere?

  • 1.15×1018 kg
  • 8.15×1018 kg
  • 5.15×1018 kg (correct)
  • 2.57×1018 kg

Which layer of Earth's atmosphere is the coldest place on Earth?

<p>Mesosphere (A)</p> Signup and view all the answers

Which layer of Earth's atmosphere contains the ionosphere?

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

At what altitude does the thermopause, also known as the exobase, occur?

<p>500-1000 km (A)</p> Signup and view all the answers

Which layer of Earth's atmosphere is too high above Earth to be accessible to jet-powered aircraft and balloons, and too low to permit orbital spacecraft?

<p>Mesosphere (A)</p> Signup and view all the answers

Which layer of Earth's atmosphere is considered to be part of interplanetary space rather than part of the atmosphere?

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

What are the three major constituents of Earth's atmosphere?

<p>Nitrogen, oxygen, and argon (C)</p> Signup and view all the answers

Which layer of Earth's atmosphere is located above the mesosphere?

<p>Thermosphere (C)</p> Signup and view all the answers

What is the altitude range of the exosphere?

<p>700 to 10,000 km (A)</p> Signup and view all the answers

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