Multiple choice

The crust and uppermost mantle make up the rigid outer layer of Earth called the ____

  1. asthenosphere

  2. lower mantle

  3. geosphere

  4. lithosphere

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The lithosphere is the rigid outer shell of the Earth, composed of the crust and the uppermost part of the mantle. The asthenosphere is the more ductile, plastic layer beneath it.