Across
- 2. The supercontinent that broke up about 200 million years ago
- 5. What is it called when the denser oceanic crust goes under the less dense continental crust
- 6. This boundary occurs when two plates slide past eachother
- 11. The type of crust that's less dense than the other, and goes over the subducting crust
- 14. what surrounds the earth protecting it from things such as the radiation from the sun.
- 15. The person that presented the theory of continental drift
- 18. What type of basalt forms piles at mid-ocean ridges
- 19. What theory states that the lithosphere is broken up in sections/pieces
- 21. What forms when 2 oceanic plates diverge
- 22. What is the study of Earth’s ancient magnetic fields preserved in rocks and sediments
- 23. what is the thin outermost layer of the Earth
- 25. What is a curved chain of volcanic islands that forms above an ocean–ocean subduction zone as magma rises from the subducting plate
Down
- 1. The liquid layer of the earth
- 3. The type of plate boundary where plates move toward eachother
- 4. The theory of plate tectonics states that this is broken up into sections or pieces.
- 7. What is a linear chain of volcanoes that forms above a subduction zone on an overriding tectonic plate
- 8. What is the division of Earth into the crust mantle and core based on chemical composition
- 9. What is a technology that uses reflected sound waves to map the depth and topography of the ocean floor
- 10. The type of plate boundary where plates move away from eachother
- 12. what is the shaking of the ground caused by the sudden movement of tectonic plates
- 13. What type of rock is the oceanic crust made of?
- 16. The Transfer of heat by the movement of a fluid
- 17. What type of waves help us understand the composition of the earth
- 20. The lesser and denser crust, usually the one to subduct in subduction
- 24. At the center of the earth, this layer contains iron and nickel is called