Liam's Layers of Earth and Plate Tectonics

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Across
  1. 1. the way layers behave due to pressure and heat
  2. 3. this semi-liquid is extremely hot
  3. 5. this layer is rigid due to high pressure, it is the lower mantle
  4. 6. this is the thinnest layer of the earth
  5. 11. beneath the lithosphere
  6. 12. this is the deepest layer of the earth
  7. 13. this theory states that continents move across the earth overtime
  8. 14. this is the largest layer of the earth
  9. 19. this layer is made of the crust and holds continental and oceanic plates
  10. 21. this event happens unpredictably and causes earth's poles to swap
  11. 22. this mineral records earth's magnetic polarity when it was deposited
  12. 23. this type of boundary spreads apart
  13. 24. this type of invisible field surrounds the earth
Down
  1. 2. elements or materials that layers are made from
  2. 4. this scientist mapped out the mid-atlantic ridge by hand
  3. 7. makes up oceanic crust
  4. 8. makes up continental crust
  5. 9. this type of boundary comes together
  6. 10. this type of crust is made from mostly granite
  7. 14. this is used to describe a solid that has been turned into almost liquid
  8. 15. this natural event is caused by the movement of tectonic plates
  9. 16. this type of arc is formed above a subduction zone
  10. 17. this is formed by seafloor spreading
  11. 18. these currents cause continents to move
  12. 20. this person proposed continental drift