Plate Tectonics
Across
- 2. A layer of plastic in the lower mantle
- 4. A place where extremely hot material from inside Earth erupts at the surface
- 6. Name for the crust and the upper mantle together; Earth's tectonic plates
- 9. Where plates are sliding parallel to each other, but in opposite directions
- 12. A longitudinal seismic wave that that travels fast through earth
- 14. A zone where Earth's crust and mantle are being pulled apart
- 16. Mountains formed by crust crumpling upwards as plates collide
- 17. The focus or middle point of an earthquake
- 18. When one plate sinks below another during a collision
- 19. The rapid movement of the ground,usually back and forth and up and down in a wave motion, due to the movement of tectonic plates
Down
- 1. Process of new crust forming at the ocean ridge and spreading
- 3. The separating of continents
- 5. An instrument that detects the seismic waves form an earthquake
- 7. Section of Earth's crust that moves about on earth's surface
- 8. The centre of Earth
- 10. A deep channel in the ocean floor where crust is sinking down
- 11. Layer beneath Earth's crust
- 13. Earth's outermost solid layer
- 14. Older crust is pushed below new ocean crust and squeezes the plates sideways
- 15. A huge wave caused by an earthquake on the sea floor