Plate Tectonics

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Across
  1. 3. Zone When the ocean floor is spreading
  2. 6. When continental crusts push inward and up
  3. 8. tectonics How the earth has been shaped
  4. 9. Tectonic plates that slide under each other
  5. 10. A thick liquid and made mostly of silicate minerals
  6. 11. When things cool off they become ____ dense
  7. 12. ridge Oceanic crust also known as ____
  8. 14. When plates move away from each other
  9. 15. of Fire Area around the Pacific ocean
  10. 16. Warm things become ____ dense
  11. 18. poles Changed locations several times in earth’s history
  12. 19. Crust Lithosphere or ____ is made of basalt
Down
  1. 1. Wegener A meteorologist that developed the theory of continental drift
  2. 2. How many plates make up the earth's surface
  3. 4. When plates are sliding beside each other
  4. 5. Plate tectonics are made of what part of the earth
  5. 6. When plates move toward each other
  6. 7. Crust Lithosphere or ____ is made of granite
  7. 13. plate The plate that India slammed into 50 million years ago
  8. 17. When all the plates were together it made a place called...