Across
- 4. When two plates collide
- 5. When plates rub against each other
- 7. the lower crust that is broken into separate pieces
- 8. When two plates pull apart
Down
- 1. When convergent plates are different densities
- 2. Theory by Harry Hess that supports the theory of Plate tectonics
- 3. Causes movement of Tectonic plates
- 6. Flowing rock in the mantle