Plate Tectonics
Across
- 2. A thin interface that separates the mantle and the crust
- 5. plate convergence that results in the growth of young mountains ranges
- 6. Ridge A basaltic mountain range at the bottom of the ocean that is composed mostly of volcanoes and lava flows
- 7. The outer most part of Earth below the atmosphere or hydrosphere
- 9. a type of plate boundary where plates collide by sliding past each other
- 13. a type of plate boundary where two plates separate
- 14. The whole crust and the rigid together that is divided into plates
- 16. Currents these are believed to drag or push the plates apart at places where plates diverge
- 18. Spots major regions of volcanic activity in the interior parts of plates away from plate boundaries
- 19. Arc A series of volcanoes and volcanic islands
- 20. Tectonic Theory The theory that Earth's lithosphere is broken up into sections or plates and their movement and interaction produce major changes in Earth's surface
Down
- 1. a type of plate boundary where two plates collide
- 3. Mountains Relatively new mountain ranges
- 4. Ocean Basin Formed when the crust at the margin of the continent becomes bent down; it is the site of much deposition of sediments
- 8. the process where two plates converge and the denser of the two plates sinks under the other plate
- 10. Earth's thickest zone that contains approximately 80 percent of Earth's volume
- 11. A plastic-like portion of the upper mantle that is at least partly molten
- 12. Trench A long, steep, and narrow depression formed by the bending down of the subducting plate warping the crust
- 15. Crust Makes up the continents and larger islands; mostly made up of granite
- 17. Crust Makes up most of the crust beneath the oceans; mostly made up of basalt