Soil Erosion

1. a dark-colored substance that forms as plant and animal remains decay.
5. The material that is moved by erosion
6. when soil deteriorates because of human activity and loses its quality and productivity.
8. A layer of soil that differs in color and texture from the layers above or below it.
9. process of depositing sediment from water runoff.
11. a crumbly, dark brown soil that is a mixture of humus, clay and other minerals. It is the best soil for plant growth.
12. The wearing away of the land surface by water, wind, ice, gravity or other natural or anthropogenic agents that abrade.

2. the management of soil to prevent its destruction.
3. occurs when the agents of erosion (wind, water, ice and gravity) lay down sediment in a new location, such as in a river delta.
4. A well-draining soil that is made up of about equal parts of clay, sand and silt.
7. a mass movement landform and a process characterized by moderately rapid to rapid (greater than 30 cm per year) downslope transport by means of gravitational stresses,
10. material transported and deposited by wind and consisting of predominantly silt-sized particles, forming important fertile soils.