Tectonic plates

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Across
  1. 4. Top layer of the earth
  2. 5. the plates _____ 1.6 cm a year
  3. 7. ____ is the ability of an object to float in a fluid by displacing a volume of that fluid
  4. 8. Are formed by two divergent plates
  5. 10. Cracks in the Earth's surface that allow magma to flow from them
  6. 12. ______ plates are when two plates come together
  7. 13. the mantle is made of hot _____ rock
  8. 14. Center of the Earth
  9. 15. Middle layer of the earth
  10. 17. ocean ______ form at divergent plate boundaries
  11. 19. how many minor plates are there?
  12. 20. crust is ____ created or destroyed at transform plates
Down
  1. 1. _____ occur when two transform plates side past each other
  2. 2. The Mariana trench appears where two ____ plates interact
  3. 3. _____ are formed by two convergent plates
  4. 4. Transfer of heat without contact
  5. 6. ______ plates are when two plates slide past each other
  6. 9. continent sized columns of superheated mantle is called a mantle ____
  7. 11. Transfer of heat with contact
  8. 16. the supercontinent that split apart
  9. 18. how many major plates are there?