The Earth's Atmosphere
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Questions and Answers

What is the approximate atmospheric concentration of carbon dioxide?

  • 0.0386% (386 ppm) (correct)
  • 0.386% (3860 ppm)
  • 0.000386% (3.86 ppm)
  • 3.86% (38600 ppm)

    • Where is the atmospheric concentration of water vapor the highest?

  • At high altitudes
  • In deserts
  • Over polar ice caps
  • Near ocean surface in tropics (correct)

    • What is the main source of atmospheric nitrogen over a long period?

  • Plant and animal respiration
  • Combustion
  • Volcanic eruptions
  • Outgassing (correct)

    • What is the primary process through which carbon dioxide is removed from the atmosphere?

    <p>Photosynthesis by plants</p> Signup and view all the answers

    What is the approximate residence time of carbon dioxide in the atmosphere?

    <p>150 years</p> Signup and view all the answers

    What are particulates in the atmosphere primarily composed of?

    <p>Solid or liquid particles</p> Signup and view all the answers

    Which profile characterizes the atmosphere based on the constant concentration of permanent gases?

    <p>Chemical Profile</p> Signup and view all the answers

    What dominates the heterosphere, which is above the homosphere?

    <p>Helium and hydrogen</p> Signup and view all the answers

    What causes the variation in temperature in the atmosphere?

    <p>Gravity and gas laws</p> Signup and view all the answers

    What is the primary sink for the removal of particulates from the atmosphere?

    <p>Dry and wet deposition</p> Signup and view all the answers

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