Plate Tectonics

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Across
  1. 2. when a plate moves under another
  2. 4. lowland area where plates move apart
  3. 8. supercontinent
  4. 9. break in the earths crust from plate movement
  5. 10. how many plates are there
  6. 12. where most divergent boundries are found
  7. 15. evidence of a supercontinent from ice covering the earth
  8. 17. evidence of a supercontinent that comes from animals
  9. 19. occur when the earths crust cracks and magma rises up
  10. 20. longest fault line in the world
Down
  1. 1. 90% of the worlds eathquakes
  2. 3. two plates move away from each other
  3. 5. plate tectonics theory was develped ___ years ago
  4. 6. happens when plates move (converging or diverging)
  5. 7. layer of earth where convection currents occur
  6. 11. type of map that shows plate outlines
  7. 13. plate canada makes up
  8. 14. theory created by alfred wegener in 1912
  9. 16. outer layer of earth including the crust and upper mantle
  10. 18. when plates move towards each other