Plate Tectonics

2. the shaking, wave like movement of the ground in an earthquake
5. A deep trench in the ocean floor, much deeper than the rest of the ocean floor
7. The process of new crust forming at the ocean ridges and spreding outwards
8. the point on the earths surface directly above the surface of an earthquake
9. the crust that forms the continents
13. process of continents breaking up, subsiding and allowing into the sea
14. an instrument that detects the seismic waves from an earthquake
16. where the crust is sinking down into the earth

1. The theory that the earth's crust is cracked into several pieces and move across the asthenosphere.
3. molten rock below the earths surface
4. 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
6. The movement of the earths contineents relative to each other
10. the crust that forms the ocean floor
11. molten rock that has erupted on the earths surface
12. a huge wave in the ocean caused by an earthquake occurring on the seafloor
15. a place where extremely hot material from inside the earth erupts at the surface