Across
- 4. layer between crust and outercore
- 6. the outer layer of the earth
- 7. plates moving away from each other
- 8. magma outside of a volcano
- 11. a sudden, violent shaking of the ground
- 14. vibrations in the earth's crust
- 15. crack in the earth's crust
Down
- 1. causes plate tectonics to move
- 2. scale used to measure seismic waves
- 3. one plate is driven beneath the other
- 4. created by convergent colliding
- 5. giant wave
- 9. the only liquid layer
- 10. molten rock that is underground
- 12. ejection of molten rock from a volcano
- 13. material oceanic crust is made mostly of