Across
- 2. huge wave in the ocean
- 3. flow/A cloud of ash, rock and gas exits from volcano
- 7. is sinking down into the earth
- 8. wave/A seismic wave.
- 9. rock that has erupted onto the earth's surface.
- 11. the point on the earth's surface directly above the focus of an earthquake.
- 13. rock
- 15. layer of plastic
- 17. striping/Patterns of magnetism
- 18. boundary/ where plates are moving apart from each other in opposite directions.
Down
- 1. break up
- 4. crust/ the crust that forms the ocean floor
- 5. boundary/Plates are sliding parallel
- 6. rapid movement of the ground usually back and forth.
- 10. place where there is extremely hot material.
- 12. spreading/The process of new crust forming at the ocean ridges.
- 14. boundary/Plates are colliding with each other
- 16. tectonics/the theory that the earth's crust is cracked into many large pieces.
- 19. arc/A chain of islands