JSB Chapter 2 Puzzle

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