JSB Chapter 2 Puzzle

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Across
  1. 1. the difference in elevation from one contour line to another
  2. 3. how much soil supports the plants
  3. 4. the area of Great Plains that caused soil loss during the 1930's
  4. 5. when a substance combines with oxygen forming rust
  5. 7. rich fertile soil that has equal parts of silt, sand, and clay
  6. 8. a type of weathering when rocks are broken down with chemical changes
  7. 9. grinding away at rocks by other rocks carried by water, wind, or ice
  8. 10. loose weathered material on surface where plants can grow on
  9. 11. plowing fields along slopes that prevent soil loss
  10. 13. a map that shows an area's land features
  11. 15. a trait of a material that is full of tiny air spaces that water can go through
  12. 17. a method to keep last year's crops in the ground to keep the soil in place
  13. 21. a line on a topo map that connects to equal elevation points
  14. 24. when you switch crops every year to keep the soil fertile
  15. 25. a thick mass of roots of grass and soil
  16. 26. a solid layer of rock below the soil
  17. 27. a type of soil that has different colors and texture than other soil
  18. 28. the layer of soil beneath topsoil but has mostly clay and other minerals
  19. 29. the process when wind, water, ice, and gravity carries weathered rock and soil
  20. 30. loose layer of dead plant leaves on the surface of soil
Down
  1. 2. the principe that states the same process happened long ago as of today
  2. 6. a type of weathering when rocks are broken apart in physical ways
  3. 12. dark organic material in soil
  4. 14. a bolded contour line that shows an elevation number
  5. 16. the process that breaks down the Earth's surface
  6. 18. anything that is enviromental that humans use
  7. 19. the management of soil to stop destruction
  8. 20. soil organism that breaks down and digest remains of soil
  9. 22. when water seeps through cracks in a rock then freezes and expands
  10. 23. the top most part of soil that has a mixture of humus and other minerals