This National Park lesson plan focuses on the destructive forces of nature in Yellowstone National Park, but student investigations can be adapted to any landscape. Students work in groups to create a landscape (a model of a small mountain) from a variety of earth materials. Provided handouts are used to record their predictions and observations about landscape change. Their models include a volcanic eruption. Students observe other student groups’ models as they discuss how wind, water, and ice are major agents of weathering and erosion.