Plate Techtonics

3. wave a seismic wave that travels along the surface of the earth in the crust
6. molten that has erupted onto the earths surface
8. the point on the Earth surface directly above the focus of an earthquake
10. : the rapid movement of the ground, usually back and fourth and up and down in a wave motion due to the movement of tectonic plates
11. trench: a deep trench in the ocean floor that us much deeper then the rest of the ocean floor
13. drift :the separating of continents by drifting across oceans
16. crust: the crust that forms the continents

1. a molten rock below the earths surface
2. the process of continent's breaking up, subsiding and allowing the sea in
4. spreading : the process of new crust forming at the ocean ridges and spreading outwards
5. crust : the crust that forms the ocean floor
7. an instrument that detects the seismic waves from an earthquake
9. when oceanic crust collides with continental crust, and the oceanic plates then sink below the continental plate
12. tectonics: the theory that the earths crust is cracked into large pieces that move on the atmosphere
14. a huge wave in ocean cause by an earthquake occurring on the seafloor
15. a place were extremely hot material from inside the Earth erupts at the surface