plate tectonics
Across
- 5. The core mantle boundary of Earth is between the earth’s mantle and outer core
- 9. boundary Is something that is between two combined tectonic plates
- 12. the area where oceanic crust sinks beneath continental crust
- 13. the process by which molten material adds new crust to the ocean floor
- 15. deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle at a convergent boundary
- 16. a lowland region that forms where Earth's tectonic plates move apart, or rift.
- 17. a plate boundary where two plates move past each other in opposite directions
- 18. the process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle
- 19. Alfred Wegner's hypothesis that the continents were once joined together in a single landmass and have slowly moved apar
- 20. a plate boundary where two plates move away from each other
Down
- 1. a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
- 2. the supercontinent that existed millions of years ago
- 3. created by two pieces of continental crust converging or coming together
- 4. an undersea mountain chain where new ocean floor is produced at a divergent boundary
- 6. boundaries occur when two continental plates move towards each other.
- 7. a geological process in which the oceanic lithosphere and some continental
- 8. any trace of an ancient organism that has been preserved in rock
- 10. he result of differential heating. Lighter warm material rises while heavier cool material sinks.
- 11. a type of fault in which two tectonic plates slide past one another
- 14. the theory that states that pieces of Earth's lithosphere are in constant slow motion