Mod 6 Part 2 Crossword

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Across
  1. 5. theory that the lithosphere is made of several “plates” that all move about on the plastic rock of the asthenosphere.
  2. 6. volcanoes that scientists think will never erupt again
  3. 7. another term for volcano
  4. 10. When plates collide, one can slide under the other, generally forming a trench with mountains on one side. When this happens, crust is destroyed as it melts into the mantle. This typically occurs along the edge of a continent. The cascade mountains mark such an interaction.
  5. 12. all the continents connected as a supercontinent
  6. 13. volcanoes that have not erupted in a long time
  7. 14. study of earthquakes
  8. 15. the point on the surface of the earth directly above an earthquake’s focus
  9. 17. type of mountain formed as the result of magma moving from the mantle and into the earth’s crust
  10. 18. mountain that is rounder and more sloping than a volcanic mountain
  11. 19. mountains formed when two moving rock masses push against each other with extreme force. The crust can bend in an up-and-down rolling pattern.
  12. 20. Vibration of the earth that results either from volcanic activity or rock masses suddenly moving along a fault.
Down
  1. 1. The boundaries between two sections of rock that can move relative to one another.
  2. 2. When plates slide (or shear) against each other, their edges scrape against each other. Crust is neither made nor destroyed, but this motion can result in severe earthquakes. This is what is happening at the San Andreas Fault in California.
  3. 3. rebound theory:
  4. 4. volcanoes that have erupted recently
  5. 5. When plates collide and neither slides under the other, they buckle, forming mountains. Crust is not made or destroyed. It just buckles. The Himalaya Mountains mark such an interaction.
  6. 8. When plates move away from each other, magma leaks up from the mantle, creating new crust. This occurs typically in the middle of the ocean floor
  7. 9. developed by a seismologist named Charles Richter. It measures the strength of an earthquake based on the nature of the seismic waves it produces.
  8. 11. The point where an earthquake begins
  9. 16. kind of mountain which forms when one rock mass is moving up and the other is stationary or moving down. THe upward moving mass of rock will form a mountain that rises up from the stationary or downward moving rock.