Erosion, Plate Tectonics, Earthquakes, and Geologic Time

Edit Answers
1234567891011121314151617181920
Across
  1. 4. When two plates of oceanic lithosphere collide, the older, denser plate subducts under the other plate.
  2. 5. The succession of eras,periods, and epochs as considered in historical geography
  3. 6. When two plates move past each other horizontally this forms.
  4. 7. Are ground movements that occur when blocks of rock in earth move suddenly and release energy.
  5. 8. The process in which the surface of the earth is worn away.
  6. 9. Some pars of the Mantle become hotter than other parts. The hot parts rise as the cooler, denser materials sink and push the hotter materials upward. What is this process?
  7. 10. Stress that stretches rock and makes rock thinner.
  8. 13. The force of the cooler, denser rocks moving down and away from the ridge.What is this process?
  9. 14. A single large landmass formed about 245 million years ago.
  10. 15. When two plates collide this forms.
  11. 16. In this process, molten rocks from inside of earth rise through the cracks in the ridges, cools, and forms new oceanic crust.
  12. 18. When a plate of oceanic lithosphere collides with a continental lithosphere, the oceanic lithosphere subducts because it is denser
  13. 20. Stress that distorts a body by pushing different tectonic plates in opposite directions.
Down
  1. 1. When two plates move away from each other this forms.
  2. 2. Describes the large-scale movements of earth's lithosphere.
  3. 3. When two plates of continental lithosphere collide, they buckle and thicken(creates mountains)
  4. 11. Where two or more Tectonic Plates meet.
  5. 12. Stress that shortens or squeezes an object.
  6. 17. A break in Earth's crust along which blocks of rock move.
  7. 19. At subduction zones, a denser plate sinks beneath another, less dense plate. As it sinks, the leading edge of the plate pulls the rest of the plate with it. What is this process?