Chapter 2

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Across
  1. 2. a difference of something from one contour line to another
  2. 3. how we'll soil supports plant growth
  3. 4. a heavier contour line on a map
  4. 7. the loss of soil in the Great Plains around the 1930's
  5. 10. soil organisms that break down dead plants and animals
  6. 13. a weather when rock is physically broken
  7. 19. a map that shows a type of area
  8. 21. the way to prevent soil destruction
  9. 24. tiny air spaces that water can seep through in material
  10. 26. a process that breaks down rock
  11. 27. things humans use in nature
  12. 29. the process when things move weathered rock and soil
Down
  1. 1. rich soil that has equal parts of silt clay and sand
  2. 2. process that breaks rocks through chemical change
  3. 5. a chemical change that forms rust
  4. 6. mixture of minerals that makes up the topmost layer of soil
  5. 8. solid rock beneath the soil
  6. 9. was operated in the past to change earths surface
  7. 11. organic material in soil
  8. 12. a line that connects 2 separate points on a map
  9. 14. dead crops left in the ground to hold a place in the soil
  10. 15. the dead plants on the soils surface
  11. 16. process that splits up rock into small cracks
  12. 17. the layer beneath the top soil that has clay
  13. 18. plowing fields with a slope to prevent soil loss
  14. 20. weathered material where plants can grow
  15. 22. soil that is different through color and texture
  16. 23. keeping a soils fertility by planting different crops each year
  17. 25. the grinding away of rock from other rocks
  18. 28. mass of roots grass and soil