Chapter 2

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