Plate Tectonics

2. plates that rub against each other
4. A former supercontinent on the Earth in the distant past a large landmass
5. Wegener- the person that came up with the theory of Continental Drift
8. drift- Continents slowly move on Earth's surface
10. ocean ridge-a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the oceanic mantle.
13. soft layer of the mantle on which the lithosphere floats
18. core-the liquid layer of the Earth's core that lies beneath the Mantle and surrounds the inner Core
19. valley-A deep valley that forms where two plates move apart.
20. an ancient organisms that has been preserved in rock

1. - plates collide together to make mountains
3. ocean ridge-an undersea mountain chain where new ocean floor is produced at a divergent plate boundary.
6. middle of the ocean contribute to seafloor spreading
7. the layer of the earth between the crust and the core
9. solid part of the earth consisting of the crust and outer mantle
11. tectonics-a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
12. core-a dense sphere of solid iron and nickel at the center of Earth
14. the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.
15. floor spreading- the process by which molten material adds new oceanic crust to the ocean floor.
16. the outer layer of the Earth
17. Fractures in rock