Plate tectonics chapter 5 vocabulary

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Across
  1. 3. When Wegener's idea was that the continents slowly moved over earths surface
  2. 4. Any trace of an ancient organism that has been preserved in a rock
  3. 7. When mid-ocean ridges add a new material to the ocean floor
  4. 8. A measure of how much mass there is in a given volume of a substance
  5. 10. When resulting volcanoes create a string of islands
  6. 11. When Plates Slip past eachother
  7. 13. A major belt of volcanoes
  8. 14. Long chains of mountain that rise up from the ocean floor
  9. 16. When the ocean floor plunges into canyons
Down
  1. 1. Plate motions in a theory
  2. 2. When plates come together or converge together
  3. 5. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle
  4. 6. The flow that transfers heat within a fluid
  5. 9. An area where material from deep within earth's mantle rises through the crust and melts to form magma
  6. 12. When the continents were joined together
  7. 15. When plates move apart or diverge from eachother