Earth's Structure and Continental Margins
15 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary composition of the Earth's core?

  • Oceanic crust
  • Solid rock and pockets of magma
  • Mainly metals, such as iron and nickel (correct)
  • Tectonic plates

    • What is the approximate percentage of the Earth's volume that the mantle makes up?

  • 90%
  • 50%
  • 84% (correct)
  • 15%

    • What is the outermost layer of the Earth?

  • Lithosphere
  • Mantle
  • Crust (correct)
  • Core

    • What is the result of the movement of tectonic plates?

    <p>Tectonic and seismic activity</p> Signup and view all the answers

    What is the rate at which tectonic plates move over the surface of the Earth?

    <p>A few centimeters per year</p> Signup and view all the answers

    What is the main characteristic of the Ring of Fire?

    <p>High levels of volcanic activity due to subduction</p> Signup and view all the answers

    What is the result of erosion on passive continental margins?

    <p>Flat inland geography with low levels of tectonic pressure</p> Signup and view all the answers

    What is the difference between sea canyons and oceanic trenches?

    <p>Sea canyons are formed by erosion, while oceanic trenches are formed by subduction</p> Signup and view all the answers

    Which of the following continents is nearly completely bounded by passive continental margins?

    <p>Africa, Antarctica, and Australia</p> Signup and view all the answers

    What is an example of an emergent coast?

    <p>A coast resulting from tectonic activity pushing the crust up</p> Signup and view all the answers

    What is the primary difference between oceanic plates and continental plates?

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

    What feature is typically associated with an active continental margin?

    <p>Rising mountain ranges</p> Signup and view all the answers

    What process is responsible for the oceanic crust being melted and recycled?

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

    What is the result of the process of subduction at an active continental margin?

    <p>Creation of a deep ocean trench</p> Signup and view all the answers

    What is an example of an area with an active continental margin?

    <p>West coast of North America</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser