Across
- 2. the liquid layer of the earth
- 4. This is the hottest and densest layer
- 6. the study of earth's magnetic polarity
- 10. when a magnetic field flips it is called a ...
- 14. a natural rapid shaking of the lithosphere caused by the release of energy
- 18. strong lower part of the mantle, it is rigid due to great pressure
- 19. this theory states that earth's lithosphere is broken into sections or pieces
- 21. is weak and deformable, forms very slowly
- 22. this is crust made of granitic rock
- 23. this theory stated that continents once existed as one big supercontinent
- 25. caused by the very hot materials rising and the cooler materials siniking
Down
- 1. this feature forms when two ocean plates separate
- 3. field our... flipped 780,000 years ago
- 5. plates slip past each other
- 7. the layer of hot solid material between earth's crust and core
- 8. when two plates separate
- 9. an undersea valley that represents one of the deepest parts of the ocean
- 11. the layer of rock that forms the outer shell at the top of Earth's interior
- 12. is thick and under the ocean
- 13. iron rich material found in igneous rock
- 15. this process occurs when two plates of different densities converge
- 16. the layer of rock that forms earth's outer surface
- 17. a molten mixture of rock forming substances, gases and water from the mantle
- 20. when two plates collide
- 24. the super continent were all the continents were once together