Earth's Systems Quiz
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Questions and Answers

What is the composition of the Earth's crust?

  • Primarily consisting of organic compounds
  • Made almost entirely of light elements (correct)
  • Comprised mainly of water and ice
  • Composed mainly of heavy metals

Which part of the Earth's system is described as a thin layer where life exists?

  • Geosphere
  • Hydrosphere
  • Atmosphere
  • Biosphere (correct)

What causes alterations in seismic waves as they travel through the Earth's interior?

  • Solar radiation fluctuations
  • The nature of the material through which the waves travel (correct)
  • Changes in atmospheric pressure
  • Magnetic field variations

Which layer of the Earth is described as a mixture of gases that makes up the air we breathe?

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

What are seismic waves used for by scientists to learn about the Earth's interior?

<p>To measure changes in the speed and direction of waves penetrating the interior (A)</p> Signup and view all the answers

What is the approximate thickness of the Earth's crust beneath the continents?

<p>20-70 km (B)</p> Signup and view all the answers

Which part of the Earth's system is described as containing rock, soils, and sediments in the surface and interior of the Earth?

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

What percentage of Earth's mass does the crust make up?

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

What is the main cause of alterations in seismic waves as they travel through the Earth's interior?

<p>Movement of tectonic plates (C)</p> Signup and view all the answers

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