Earth Structure

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Across
  1. 3. system of frozen water
  2. 6. breakdown of rock
  3. 8. the drying up of vegetation
  4. 9. system of gas surrounding Earth
  5. 13. system of interacting life
  6. 16. zone where one plate sinks under another
  7. 17. describes the "why" something happens in nature
  8. 20. dating rocks for a guess at an age (is a scientific law)
  9. 22. is the convecting fluid mantle
  10. 24. describes the "what" in nature
  11. 26. broken into plates; is the crust & upper, solid mantle
  12. 27. movement of rock
  13. 30. rock made of layers of compacted sediment
  14. 31. is a testable educated guess
Down
  1. 1. plates that slide past each other
  2. 2. is cutting down trees for human use
  3. 3. is the cycle of hot fluids rise & cold fluids fall
  4. 4. system of water on, above, & below Earth
  5. 5. plates that move into each other
  6. 7. settlement of rock
  7. 10. dating rocks for exact age
  8. 11. most outer layer of Earth
  9. 12. plates that move apart from each other
  10. 14. a crack in Earth's crust
  11. 15. system of natural, non-living material
  12. 18. the growth of population & cities
  13. 19. rock that's been changed under heat & pressure
  14. 21. large amount of pressure on sediment
  15. 23. most inner layer of Earth
  16. 25. how hard rock becomes molten
  17. 28. molten rock that is cooled & solidified becomes ____ rock
  18. 29. lava & magma are considered ____ rock because they're liquid