Plate Techtonics
Across
- 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
Down
- 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