Plate Tectonics

7. Boundary Where plates are sliding parallel to each other, but in opposite directions
9. Trench A deep channel in the ocean floor where crust is sinking down
10. A zone where Earth's crust and mantle are being pulled apart
11. mountain Mountains formed by crust crumpling upwards as plates collide
14. A layer of plastic in the lower mantle
15. An instrument that detects the seismic waves form an earthquake
17. Wave A longitudinal seismic wave that that travels fast through earth
18. Name for the crust and the upper mantle together; Earth's tectonic plates
19. When one plate sinks below another during a collision
20. Drift The separating of continents

1. A huge wave caused by an earthquake on the sea floor
2. The centre of Earth
3. 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
4. Layer beneath Earth's crust
5. The focus or middle point of an earthquake
6. Earth's outermost solid layer
8. Push Older crust is pushed below new ocean crust and squeezes the plates sideways
12. A place where extremely hot material from inside Earth erupts at the surface
13. Spreading Process of new crust forming at the ocean ridge and spreading
16. Plate Section of Earth's crust that moves about on earth's surface