Plate Tectonics

12345678910111213141516171819
Across
  1. 4. the name of the single landmass that broke apart 225million years ago
  2. 5. a dense sphere of solid iron and nickel in the center of the Earth (2wrds)
  3. 8. amount of force pushing on an area
  4. 9. a deep valley that forms where 2 plates move away from each other
  5. 10. a well tested concept that explains a wide range of observations
  6. 11. where the oceanic crust sinks beneath a deep ocean trench
  7. 14. a boundary where 2 plates move toward each other
  8. 16. a soft layer which floats on the lithosphere
  9. 17. a system that determines the distance of an object under water.
  10. 18. the layer of rock that forms Earths outer core
  11. 19. a boundary where 2 plates slide past each other
Down
  1. 1. the hypothesis that the continents slowly moved across the Earth’s surface
  2. 2. the layer of hot solid material between the core and crust
  3. 3. a ridge layer made up in the upper most part of the mantle
  4. 6. a break in the lithosphere
  5. 7. the movement of a fluid caused by difference in temperature (2wrds)
  6. 10. a vibration that travels through Earth carrying energy released in an earthquake (2 wds)
  7. 12. a layer of molten iron and nickel(2wrds0
  8. 13. the amount of mass in a given space
  9. 15. a boundary that moves away from each other