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

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

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

What are particulates in the atmosphere primarily composed of?

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

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

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

What dominates the heterosphere, which is above the homosphere?

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

What causes the variation in temperature in the atmosphere?

<p>Gravity and gas laws (D)</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 (A)</p> Signup and view all the answers

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