Plate Techtonics

2. an instrument that detects the seismic waves from an earthquake
3. The theory that the earth's crust is cracked into several pieces and move across the asthenosphere.
6. A deep trench in the ocean floor, much deeper than the rest of the ocean floor
8. molten rock below the earths surface
10. The movement of the earths contineents relative to each other
12. where the crust is sinking down into the earth
13. a place where extremely hot material from inside the earth erupts at the surface
14. molten rock that has erupted on the earths surface

1. 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
2. The process of new crust forming at the ocean ridges and spreding outwards
4. the shaking, wave like movement of the ground in an earthquake
5. a huge wave in the ocean caused by an earthquake occurring on the seafloor
7. the crust that forms the ocean floor
9. process of continents breaking up, subsiding and allowing into the sea
10. the crust that forms the continents
11. the point on the earths surface directly above the surface of an earthquake