Science

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Across
  1. 4. Glaciers cover most of..
  2. 7. Crust Is being made at the Mid-Ocean ridges
  3. 8. Thinnest layer of Earth
  4. 11. found high up in the mountains
  5. 14. The... is approximately 4.5 billion years old
  6. 15. Are areas in the boundaries that are "super active"
  7. 16. Core 2nd thinnest
  8. 17. The process of new crust and destroyed/recycled
  9. 19. Glaciers abrade and ____ rocks and sand as they move over the land
  10. 20. how many layers of the Earth
  11. 21. How many major plates?
Down
  1. 1. Thickest layer
  2. 2. Glaciers are also responsible for the formation of valleys and types of..
  3. 3. They cover whole continents
  4. 5. Long periods of this is called..?
  5. 6. Recycled at the Deep-Ocean Trenches
  6. 9. Moves extremely slow
  7. 10. core 2nd thickest
  8. 12. The Earths crust is..
  9. 13. The theory of Continental Drift was put forward by
  10. 18. Glaciers are like..
  11. 21. How many main types of glaciers