Across
- 3. multiple volcanic peaks along ridge
- 4. passage magma travels through
- 9. no eruption in historic times
- 11. underwater mountain chain from tectonic activity
- 13. molten rock on Earth’s surface
- 14. when two plates pull apart
- 15. erupts regularly
- 17. most active earthquake and volcano zone on Earth
- 18. molten rock beneath the surface
- 19. when two plates push together
Down
- 1. plates moving apart
- 2. crack in oceanic crust
- 3. shape formed by hardened lava
- 5. build-up of gases in vent before eruption
- 6. example of mid-ocean ridge
- 7. opening in Earth's crust where magma escapes
- 8. opening at the top of a volcano
- 10. sections of Earth’s crust that move
- 12. magma hardens in cold seawater
- 16. hasn't erupted in a long time but might