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

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

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

What is the distance of the Moon from the Earth?

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

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

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

What is the thickness of the Earth's Mantle?

<p>2,900 km (D)</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 (A)</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 (D)</p> Signup and view all the answers

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

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

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

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

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