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