Chapter 2

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