Across
- 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
Down
- 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