Across
- 2. an undersea mountain chain where new ocean floor is produced at a divergent plate boundary
- 4. long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries
- 7. the brittle upper portion of the mantle and the crust
- 11. When two tectonic plates come together and collide
- 13. a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other
- 14. created where two or more of Earth's tectonic plates are pushed together
- 15. a layer of rock that forms the upper mantle, the layer of the Earth between the crust and the core.
Down
- 1. the theory of a "supercontinent" existing in which all of our current landforms originated from
- 3. places where tectonic plates slide sideways past each other
- 5. when an oceanic plate runs into a continental plate and slides beneath it
- 6. a flat, low-lying valley that forms at a geographical crack or separation
- 8. occurs when two tectonic plates move away from each other
- 9. the theory of all continents drifting apart from pangaea
- 10. a long crack in the surface of the earth caused by a divergent boundary
- 12. steep depressions in the deepest parts of the ocean caused by a converge-subduct boundary