Earth's Layers Composition and Characteristics
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Questions and Answers

What is the outermost layer of the Earth composed of?

  • Nickel and iron
  • Oxygen and silicon
  • Basalt and granite
  • Silicon and aluminum (correct)

    • Which layer of the Earth is characterized by convection currents?

  • Asthenosphere (correct)
  • Outer core
  • Mesosphere
  • Lithosphere

    • What is the composition of the Inner core?

  • Hot, viscous liquid
  • Liquid form of nickel and iron
  • Molten rock
  • Solid ball of iron (correct)

    • What occurs when two oceanic plates converge?

    <p>Volcanic islands form above the sinking plate</p> Signup and view all the answers

    What is the main characteristic of the Lithosphere?

    <p>It is rigid and floats on top of the asthenosphere</p> Signup and view all the answers

    What is the main difference between oceanic and continental crust?

    <p>Oceanic crust is younger and thinner</p> Signup and view all the answers

    What is the direction of refraction of P and S waves in the mantle?

    <p>Towards lower-density mantle material</p> Signup and view all the answers

    What is the driving force behind plate motion?

    <p>The flow of the asthenosphere</p> Signup and view all the answers

    What is the process that occurs along convergent boundaries?

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

    What is the term for the study of the movement of the Earth's lithosphere?

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

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