Chapter two g

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Across
  1. 2. thawing and freezing of water I between two rocks
  2. 4. switching the crops each year to increase fertility rate of soil
  3. 6. the solid layer of rock under earths surface
  4. 7. the heavier contour lines
  5. 12. anything in nature that humans use
  6. 14. the process of rock removal with chemicals
  7. 16. the way earth has changed over time
  8. 18. change of set contour lines
  9. 19. mostly clay soil that is under the topsoil
  10. 22. map that uses line to show elevations
  11. 28. lines on a topographic map
Down
  1. 1. process that breaks down rock
  2. 3. trying to preserve dirt
  3. 5. the movement of weathered rock
  4. 8. layer of dead organic material
  5. 9. how we'll soil supports growth
  6. 10. a change when substances rusts
  7. 11. physical weathering
  8. 13. the top layer of soil
  9. 15. In the Great Plains in 1930's the _______caused soil soil
  10. 17. dark organic material in soil
  11. 19. thick mass of roots and soil
  12. 20. fertile soil
  13. 21. the layers of different soil
  14. 23. tiny holes where water is able to seep through
  15. 24. plowing on a curve to prevent soil loss
  16. 25. when rock particles change the shape of a rock over time
  17. 26. I dug in the ____ to find worms.
  18. 27. Worms are a type of _____.