Multiple choice

Which compositional layer is the largest measuring 2,898 km (1,801 mi) thick?

  1. outer core

  2. inner core

  3. mantle

  4. crust
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The mantle is the thickest compositional layer of the Earth, making up about 84% of Earth's total volume with a thickness of approximately 2,900 km. The crust is extremely thin by comparison, and the core layers are smaller in thickness.

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