Across
- 4. the sinking of an oceanic plate beneath a plate of lesser density at a convergent boundary
- 5. an oceanic rift zone that consists of long mountain chains with a central rift valley
- 9. the part of Earth which is composed mostly of rocks; the crust and outer mantle
- 11. the theory that describes the movement and recycling of segments of Earth's crust, called tectonic plates
- 13. a tectonic plate boundary along which plates slide horizontally past one another in opposite directions
- 14. a tectonic valley that forms by extensional stress which causes fracturing and the formation of normal faults
- 15. the process by which new oceanic lithosphere forms at mid-ocean ridges as tectonic plates pull away from each other
- 16. a crack in a body of rock that the rock can move along
Down
- 1. an anomalously hot, stationary point below the lithosphere where melting of the mantle and crust generates volcanism at Earth's surface
- 2. the large supercontinent at the end of the Paleozoic Era consisting of all the land on Earth, including all seven continents and other landmasses
- 3. a mountain formed by large-scale folding and uplift
- 6. a tectonic plate boundary at which two tectonic plates move away from each other
- 7. the movement of Earth's continents relative to each other
- 8. a tectonic plate boundary at which two tectonic plates move toward each other, causing collisions and subduction zones
- 10. The layer of soft but solid mobile rock found below the lithosphere
- 12. the layer of solid rock between Earth’s crust and core