Earth Crossword Puzzle

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Across
  1. 3. the upper layer of Earth`s mantle
  2. 5. part of the Earth between the core and crust
  3. 6. breaks in the Earth`s crust
  4. 11. when continests slowly move over Earth`s surface
  5. 12. trace of an ancitent organism thats preserved in rock
  6. 14. plates come together
  7. 16. deep underwater conyons
  8. 17. pieces of Earth`s crust diverge on land
  9. 18. a measure of how much mass there is in a given volume of a substance
  10. 19. ocean floor sinks beneath a deep-ocean trench and back into the mantle
Down
  1. 1. when mid-ocean ridges continually add new material to the ocean floor
  2. 2. theory that Earth`s plates are in slow constant montion
  3. 4. super continet that existed about 300 million years ago
  4. 5. formed by convergent boundaries colliding together
  5. 7. the rigid outer part of the Earth
  6. 8. plates move apart from each other
  7. 9. current the flow that transfers heat within a fluid
  8. 10. plates slip past each other
  9. 13. crust the outermost layer of Earth
  10. 15. mountain ranges along the bottom of the Earth`s floor