Plate Tectonics

3. The place below the ground where an earthquake starts
8. Process of continents breaking up, subsiding and letting the sea in
10. New crust being formed at the ocean ridges and spreading outwards
11. Isolated place away from plate boundaries, where a lot of hot magma is being created
13. An instrument for detecting the seismic waves from an earthquake
14. hot fluid or semi-fluid material below or within the earth's crust
16. Areas where one crust is sinking below another crust
17. is a continental transform fault that extends roughly 1,200 kilometers through California
18. basaltic lava rock ejected as fragments from a volcano, typically with a frothy texture

1. is a fast-moving current of deadly hot gas and volcanic matter
2. a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.
4. Boundary where plates are colliding
5. When continents separate and drift
6. The point on the Earth's surface directly above the focus
7. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
9. Chain of islands formed at the edges of colliding tectonic plates where on plate subducts
12. A huge wave in the ocean caused by an undersea earthquake
15. a supercontinent that existed during the late Paleozoic and early Mesozoic eras