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        Why Do We Have Seasons?

        Explore what causes seasons on Earth in this interactive adapted from NASA materials that features four cities at different latitudes. Use this resource to view how Earth’s axial tilt causes seasons from different perspectives and to develop and use models of sunlight received at Earth’s surface.

        Support materials include: Background Reading, Teaching Tips, and Discussion Questions. This resource was developed through WGBH’s Bringing the Universe to America’s Classrooms project, in collaboration with NASA.

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