Chapter 2

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