Envi Sci Ch 13

2. Undecomposed or partially decomposed organic matter
3. Planting of trees of plants that protect soil from the full force of the wind
7. Thin outer layer of the Earth
9. Layer under the crust
11. Made up of crust and mantle
12. The study of soil
14. Movement of organic matter and minerals into lower layers of soil.
15. Thin covering over the land consisting of minerals, organic material, air, and water mixed together

1. Level areas constructed at right angles to the slope to retain water and reduce erosion
4. Depressions on sloping land where water collects and flows off the land
5. Process of loosening and redistributing materials
6. Organic material resulting from the decay of plant and animal remains
8. The breaking down of material
10. Crumbles easily
11. Part of the Earth not covered by the oceans
13. Soil that combines both large and smaller clay particles for the perfect soil.