Multiple choice

Which of the following is true of Earth's landmasses?

  1. They are the upper part of the crust

  2. They are the densest part of the crust

  3. They are made of a single tectonic plate

  4. They were formed by earthquakes
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A Correct answer
Explanation

Earth's landmasses are part of the continental crust, which forms the uppermost layer of the Earth's lithosphere. Continental crust is actually less dense than oceanic crust, and it is divided among several different tectonic plates.

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