Multiple choice

What is the fourth layer of the Earth?

  1. Inner Core

  2. Outer Core

  3. Crust

  4. Mantle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Counting from the outside of the Earth inward, the layers are the crust (first), mantle (second), outer core (third), and inner core (fourth). The inner core is the solid, extremely hot center of the Earth.

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