Across
- 2. volcanoes formed on the ocean floor when two ocean plates collide and one is subducted
- 5. the upper part of the mantle and all of the crust - it makes up the plates
- 8. part of the core that is solid because of so much pressure pushing down
- 11. the theory for how Earth's surface is broken up into plates that move and cause earthquakes and volcanoes
- 12. type of boundary where plates move apart from each other
- 13. really thin crust that makes up the ocean floor
- 17. innermost layer of the Earth broken into two sub layers
- 19. the part of the core that is liquid due to extreme heat
- 20. the upper part of the mantle right under the lithosphere that moves very slowly
- 21. the outermost layer of Earth
- 22. theory that all the continents were together as one and they slowly drifted to their current locations
Down
- 1. long,deep,v-shaped featured underwater formed at subduction zone
- 3. type of boundary where plates collide together
- 4. the middle and largest layer of the Earth
- 6. really thick crust that makes up continents
- 7. type of boundary where plates slide right past each other
- 9. a long, narrow valley in Earth's crust where two plates are separating
- 10. an underwater mountain chain where new ocean floor is formed due to seafloor spreading
- 14. when a dense ocean plate dives under another plate and melts
- 15. hot magma rises near the mid ocean ridge, the ocean crust cracks and magma turns into rock
- 16. ancient super-continent
- 18. german scientist who proposed the continental drift theory