Chapter 2 crossword

3. soil organisms that decompose remains of organisms and digest them.
6. plowing fields along the curves of the landscape to prevent soil loss.
10. What is happening now operated in the past to change earths surface.
11. organic soil matter.
12. Planting different crops in different Felix's to let the soil stay fertile.
13. a rich fertile soil containing of water, air, silt, sand, clay,a and organic matter.
14. a resource that is natural that humans use.
16. A heavier contour line on a map.
17. A map that shows the elevation and features of an area.
19. A difference of something from one contour line to another.
22. the chemical change in which oxidation occurs.
23. when farmers leave the previous years dead plant's stalks on the ground to hold the soil in place.
26. How well the soil supports plant growth.
27. a layer of soil that differs from its neighboring soil.
28. the top layer of the soil.
29. The process when things move rocks and the earths surface.

1. A process that breaks down rock.
2. a solid layer beneath the soil.
4. A weather when rock is physically broken.
5. full of tiny little air spaces that water can seep through.
7. The process in which ice forms in cracks and expands the crack.
8. an event in the 1930's where soil erosion in the Great Plains caused storms of soil.
9. the process by which rock breaks down because of chemical changes.
15. a thick mass of thick grass and roots.
18. the layer beneath topsoil.
20. loose weathered material on earths surface.
21. The grinding away of rock from other rocks.
23. A line that connects two separate points on a map.
24. the conservation of soil to prevent its destruction.
25. a loose layer off dead plant leaves on the surface.