Across
- 5. The process in which one plate sinks beneath another.
- 7. The slow movement of continents over time.
- 10. A type of boundary where two plates move toward each other.
- 12. A deep ocean region formed by subduction.
- 13. Molten rock material inside the Earth.
- 15. A type of boundary where two plates move away from each other.
- 16. The rigid outer layer of Earth, made up of the crust and part of the mantle.
- 18. A type of boundary where two plates slide past each other.
Down
- 1. The meeting of continental plates that can form mountains.
- 2. A large ocean wave caused by disturbances on the seafloor.
- 3. The activity of magma reaching the surface.
- 4. An underwater mountain range where seafloor spreading occurs.
- 6. The middle layer of Earth, beneath the crust.
- 8. The outermost and thinnest layer of Earth.
- 9. Large blocks of Earth’s crust that move over the mantle.
- 11. Ground tremors caused by plate movements.
- 14. A more plastic layer of the mantle over which the plates move.
- 17. A crack in the crust caused by plates moving apart.