The purpose of the following lessons and activities is to familiarize students with causes and effects of erosion and for them to realize that this is an ongoing process. Even in the times of Washington these processes occurred.
Erosion is the wearing away of earth or rock.
Students should have a preliminary understanding of the earth's composition, which is various forms of rock. This may take a quick five minute review if there seems to be any confusion. All land portions of the earth look different. Agents of erosion are the different things that cause erosion. The teacher should use the pictures on the Education page at the web site to describe each picture as an example of erosion.