Across
- 4. plate boundary where two plates move past eachother in opposite direction
- 6. landmass that broke apart 200 million years ago
- 7. vibrations caused by breaking rocks along faults
- 8. there were tropical plants found here
- 9. a break or crack in Earth's lithosphere
- 10. deep valley along the ocean floor beneath which oceanic crust slowly sinks towards the mantle
- 11. where transform boundaries mostly occur
- 14. plate boundary where two plates come together
- 17. the process by which oceanic crust sinks beneath ocean trench
- 18. a valley that forms where plates spread apart
- 19. liquid core that surrounds Earth's inner core
- 20. hottest layer of the Earth
Down
- 1. the process which magma adds to the seafloor
- 2. Alfred Wegner's theory
- 3. plate boundary where two plates move away from eachother
- 5. hottest layer inside Earth that is mostly made of iron
- 6. tectonics theory that pieces of Earth are on constant motion
- 12. traces of ancient orgasms that have been preserved
- 13. opening in Earth's surface that often forms mountains
- 15. the amount of layers in the Earth
- 16. the thinnest layer of the Earth