Earth: Our Home Planet
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Questions and Answers

What percentage of the Earth's surface is covered by the global ocean?

  • 70% (correct)
  • 80%
  • 50%
  • 90%

    • What is the primary reason for the formation of the teardrop shape of the Earth's magnetic field in space?

  • The Earth's molten core and the solar wind (correct)
  • The Earth's magnetic poles and the solar wind
  • The Earth's rotation and the solar wind
  • The Earth's rotation and its molten nickel-iron core

    • What is the approximate average depth of the Earth's global ocean?

  • 1 kilometer
  • 4 kilometers (correct)
  • 2 kilometers
  • 6 kilometers

    • What is the percentage of oxygen in the Earth's atmosphere?

    <p>21%</p> Signup and view all the answers

    Where are almost all of the Earth's volcanoes located?

    <p>On the ocean floor</p> Signup and view all the answers

    What is the distance of the Moon from the Earth?

    <p>384,400 km</p> Signup and view all the answers

    What is the temperature of the Earth's Inner core?

    <p>5,400°C</p> Signup and view all the answers

    What is the thickness of the Earth's Mantle?

    <p>2,900 km</p> Signup and view all the answers

    What is the orientation of a compass needle due to the Earth's magnetic field?

    <p>Toward the North Pole</p> Signup and view all the answers

    What is the primary cause of the northern and southern lights?

    <p>Charged particles from the solar wind</p> Signup and view all the answers

    What is the tilt of the Earth's axis of rotation?

    <p>23.4 degrees</p> Signup and view all the answers

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

    <p>Iron and nickel metals</p> Signup and view all the answers

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