Plate Tectonic

6. rupture in the crust of a planetary mass object
9. trench steep depression in the seafloor formed at subduction zones where one plate moves downward beneath another
12. the solid, outer part of the Earth
13. crust a layer of earth's crust that lies under the seven continents. It is about 20 to 40 plates.
15. solid shell of a planet
16. the border between two tectonic plates
18. super continent that existed during the late Paleozoic and early Mesozoic eras
19. drift the theory that the earth was one
20. assembly of most or all of Earth's continental blocks or cratons to form a a single large landmass

1. the process which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at the convergent
2. melted rock beneath Earth's surface
3. plate the theory that slabs of crust under ocean and continents move around like jigsaw puzzle pieces
4. a crack or fracture in Earth's crust where two tectonic plates grind past each other in a horizontal direction
5. tectonic process where plate move away from each other
7. a slowly flowing layer of solid and melted rock formed by the heat and pressure
8. the layer of Earth between the core and the crust; contains the lower part of the lithosphere and all of the asthenosphere
10. shaking resulting from a sudden release of energy in the lithosphere
11. tectonic process where plates move toward each other
14. of fire created by the subduction of different tectonic plates at convergent boundaries around the Pacific
17. melted rock on Earth's surface