Free LessonWhat Students Do in this LessonAs an introduction, students identify sunspots on images of the Sun, discovering that the number, location, and size of spots is not always the same. During the first part of the activity, students make a graph that shows how the number of sunspots has changed over the past 30 years. Interpreting their graphs, students discover that there is a regular pattern to the number of sunspots (the 11-year sunspot cycle). During the second part of the activity, s