Multiple choice

According to the plate tectonic model, what layers form Earth's rigid, mobile plates?

  1. inner and outer core

  2. upper and lower mantle

  3. crust only

  4. crust and uppermost mantle

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

The lithosphere, which forms the rigid plates of plate tectonics, consists of the crust and the uppermost, solid part of the mantle.