Multiple choice

Which of the following statements is true about the interior of the earth?

  1. Crust forms the largest fraction of the earth’s volume.

  2. Mantle forms the largest fraction of the earth’s volume.

  3. Core forms the largest fraction of the earth’s volume.

  4. Mantle and core form about 80 percent of the earth’s volume.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The planet Earth is made up of three main shells: very thin and brittle crust, mantle and core. Mantle and core are each divided into two parts. Although core and mantle are equal in thickness, core actually forms only 15 percent of the earth's volume, whereas mantle occupies 84 percent. The crust makes up the remaining 1 percent.

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