In this activity, students consider the sudden release of a tremendous amount of kinetic energy when an extraterrestrial object strikes the Earth. In small groups, they study satellite images that show possible evidence of impact events. To... (View More) demonstrate their understanding of the role of impact events in shaping the Earth, students design a field expedition to determine whether or not a given landform is an impact crater. The resource includes a lesson plan, satellite images, teacher background, student readings and worksheets, a student learning assessment rubric, and extensions. (View Less)