Concepts:

1. Water has an important role in shaping the land.
2. Soil is a composite of weathered materials and organic matter at the earth’s surface. Soil components include sand, silt, clay, gravel, and humus. Each soil component has unique properties.
3. The wearing away and moving of soil and rock is erosion; the settling of eroded materials is deposition.
4. Humans can effect erosion and deposition in various ways, including clearing the land, planting vegetation, and building dams.
5. Hills, rocks, plants, and dams may change the direction and flow of water.
6. Landforms such as canyons, and deltas result from the action of flowing water.