With guidance from the teacher, students plan and carry out their second field trip. Back in the classroom, they use the information they have gathered in the entire unit to prepare an interpretation of the geologic history of their watershed. They will identify, develop, and carry out a project which incorporates what they have learned about the watershed's geologic history and which benefits the local community. The projects are assessed using rubrics developed by the class. I. Changes that affect the watershed occur within the earth's crust over vast periods of time.
Regional changes occur over time at the surface of the earth that affect the watershed.
Erosion, sedimentation, and deposition are processes that can act on large and small scales. Evidence for regional changes can occur in observable time frames. Humans and watersheds are connected, and changes that occur over short periods of time can have long-lasting effects. The watershed can affect humans and their structures. Humans can cause lasting effects on the watershed.