Internal Structure of the Earth: The Crust
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Questions and Answers

What is the characteristic of oceanic crust?

  • Low density and similar to granite in composition
  • Brittle and less ductile due to added heat
  • High density and identical to basalt in composition (correct)
  • Found only under continents

    • What is the Mohorovičić Discontinuity (Moho)?

  • A tool used to study seismic waves
  • A type of rock formation
  • A boundary between the crust and mantle (correct)
  • A type of earthquake wave

    • What is the approximate depth of the Moho under the oceans?

  • 20 km
  • 5 km (correct)
  • 10 km
  • 30 km

    • What is the approximate depth of the mantle?

    <p>2900 km</p> Signup and view all the answers

    How do we know most of what we know about the mantle?

    <p>Through seismic waves</p> Signup and view all the answers

    What is the composition of the Earth's core?

    <p>Primarily metallic iron, nickel, and oxygen</p> Signup and view all the answers

    What is the process responsible for the movement of tectonic plates?

    <p>Convection currents in the Earth's mantle</p> Signup and view all the answers

    What is the term used to describe the boundary between tectonic plates?

    <p>Fault</p> Signup and view all the answers

    What is the result of the movement of tectonic plates at fault lines?

    <p>Volcanic eruptions and earthquakes</p> Signup and view all the answers

    What is the pattern of earthquakes and volcanoes around the Pacific Ocean basin known as?

    <p>The ring of fire</p> Signup and view all the answers

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