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Lesson Planet
With a simple blackboard-style appearance, these slides list facts about the reason for the seasons, solstices, and equinoxes. It also touches on Kepler's first law of planetary motion. There are no pictures or graphics to help explain these concepts, which leave it lacking in educational value if used alone. Supplement these notes with a model of Earth on its axis and a lamp to represent the sun so that your early earth scientists can visualize the motions and their effects.
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