Across
- 4. the process by which Earth's crust breaks apart; can occur within continental crust or oceanic crust
- 6. Outer most layer of earth
- 8. The vent on the earth's surface through which magma and gases are expelled is a called a _________.
- 9. Most inner layer of earth
- 11. Thickest layer in earth crust
- 12. is the layer of the upper mantle composed of low-density rock matterial that is semiplastic,like putty.
- 14. the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle
- 17. Said to be a liquid layer
- 18. In this boundary plates slide past each other.
- 21. where two plates are moving apart, magma comes up to create new crust
Down
- 1. A major volcanic zone which is found along the Pacific ocean and travels all the way from South America, to North America and along Asia.
- 2. boundary between two colliding plates, often associated with mountain building ocean trenches and volcanic islands
- 3. This is an example of a mid ocean ridge.
- 5. When the earth's tectonic plates move, we call this a ______.
- 7. A ______________ boundary creates mountains.
- 10. What type of process is created by a divergent boundary.
- 13. When one tectonic plates dives under another, it is called __________.
- 15. boundary between two plates that are sliding past each other.
- 16. the theory that explains how large pieces of the lithosphere, called plates, move and change shape the topography of the earth.
- 19. At a convergent convergent boundary where an ocean meets a continent, the ocean dives under. This is called _________.
- 20. A ___________ boundary creates new ocean floor.