Across
- 5. The movement of heat within the mantle that drives plate motion
- 7. The rigid outer layer of Earth made of the crust and upper mantle
- 11. A plate boundary where two plates move apart
- 12. The semi-molten layer beneath the lithosphere that allows plates to move
- 13. A flat, deep area of the ocean floor
- 17. A plate boundary where two plates move towards each other
- 18. A plate boundary where two plates slide past each other
- 19. An underwater mountain that does not reach the surface
- 22. An underwater mountain chain where new ocean floor forms
- 24. A sudden shaking of the Earth's surface caused by plate movement
- 25. A layer where ocean temperature changes quickly with depth
- 26. A layer where ocean salinity changes quickly with depth
Down
- 1. An opening on the seafloor that releases hot, mineral-rich water
- 2. The steep edge leading from the continental shelf to the deep ocean
- 3. A gentle slope made of sediments at the base of the continental slope
- 4. A large moving piece of Earth’s crust
- 6. The shallow underwater edge of a continent
- 8. When one tectonic plate sinks beneath another
- 9. The process where new ocean crust forms at mid-ocean ridges
- 10. A very deep valley in the ocean floor
- 14. The thick layer of Earth beneath the crust
- 15. The thin outer layer of Earth
- 16. An opening in Earth's crust where magma, ash and gases escape
- 20. Molten rock found beneath Earth's surface
- 21. The solid centre of Earth
- 23. The liquid layer surrounding the inner core