G chapter 2

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