This site contains an activity in which students are asked to use their Earth-Moon-Sun (EMS) model to solve one of several challenge problems. Each problem contains data about celestial or seasonal phenomena that students have not encountered before. The challenge for the students is to use their EMS model to explain these new scenarios. In this final activity, the students will work in groups of two or three to produce a single product, poster that answers all aspects of the particular challenge question posed and provides both written and graphical justification. This site includes instructional notes for the teacher, eight student challenge questions with details, a rubric for poster evaluation, and links to other resources.
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