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This is an activity about understanding how the Earth’s axial tilt changes the angle at which sunlight hits the Earth, contributing to the variations in temperature throughout the seasons. Learners will create a sun angle analyzer in order to see what happens to the concentration of sunlight when the Sun is at different angles throughout the year. This will help learners realize Earth’s seasonal temperature differences are directly related to sunlight angle due to the Sun’s overall intensity at locations on the Earth. Finally, learners reflect on the results of the Sun-Earth Survey, which is Activity 2 in this set, and their experiences with all of the other activities in the guide. This is Activity 8, the final activity in the Great Explorations in Math and Science (GEMS) guide titled Real Reasons for Seasons: Sun-Earth Connections. The resource guide is available for purchase from the Lawrence Hall of Science.