VCB- Plate Tectonics
Across
- 1. the relatively thick part of the earth's crust that forms the large landmasses
- 2. a mountain range separating the plains of the Indian subcontinent from the Tibetan Plateau
- 3. Volcanic islands occur in ocean basins (such as the Hawaiian Islands) or on or near ocean ridges
- 9. the process by which new oceanic lithosphere (sea floor) forms when magma rises to Earth's surface at mid-ocean ridges and solidifies, as older, existing sea floor moves away from the ridge
- 17. located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world
- 19. any movement of matter that results from differences in density; may be vertical, circular, or cyclical
- 20. a long, seismically active submarine ridge system situated in the middle of an ocean basin and marking the site of the upwelling of magma associated with seafloor spreading.
- 21. the relatively thin part of the earth's crust which underlies the ocean basins
- 22. a sudden and violent shaking of the ground as a result of movements within the earth's crust or volcanic action.
- 23. region in which a portion of a tectonic plate sinks beneath another plate into the Earth's interior
- 24. a region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur
Down
- 1. a number of volcanoes in a volcanic arc in western North America
- 4. forms the tectonic boundary between the Pacific Plate and the North American Plate
- 5. the boundary between tectonic plates that are sliding past each other horizontally
- 6. a line of mountains connected by high ground
- 7. one edge of one crustal plate is forced below the edge of another
- 8. the boundary between two tectonic plates that are moving away from each other
- 10. to meet at a point
- 11. a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle
- 12. the boundary' between tectonic plates that are colliding
- 13. a lowland region that forms where Earth's tectonic plates move apart, or rift.
- 14. going in different directions; separating.
- 15. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust
- 16. a long, narrow, deep depression in the ocean floor, typically one running parallel to a plate boundary and marking a subduction zone
- 18. a boundary between two or more plates