Plate Tectonics

3. A huge wave in the ocean caused by an earthquake occurring on the seafloor
5. The process of new crust forming at the ocean ridges and spreading outwards
8. The process of continents breaking up, getting smaller and allowing in the sea
10. The point on the earth's surface directly above the focus of an earthquake
12. Where the crust is sinking down into the Earth
14. The crust that forms the continents
15. Molten rock beneath the surface of the earth
16. The shaking, wave-like movement of the ground during an earthquake

1. An instrument that detects the seismic waves from an earthquake
2. A deep trench in the ocean floor that is much deeper than the rest of the floor
4. The very slow process of continents separating as they drift across the oceans
6. Molten rock that has erupted onto the surface of the earth
7. The theory that the Earth's crust is cracked into many large pieces that move on the aesthenosphere
9. 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
11. The crust that forms the ocean floor
13. A place where extremely hot material from inside the earth erupts at the surface