Plate Tectonics

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

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