Across
- 6. when two tectonic plates collide
- 7. created by continental divergent boundary
- 8. the thickest layer of the earth
Down
- 1. when the ocean plate goes underneath the continental plate when colliding
- 2. when something presses together
- 3. Harry Hess came up with this theory
- 4. made up of mostly iron and nickel
- 5. the hottest layer of earth
- 6. 1 percent of the earth is _______