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    American Association for the Advancement of Science
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    In this lesson that includes hands-on activities and demonstrations, learners discover that it is the tilt of the Earth's axis (not its proximity to the sun) that causes the seasons. Learners...

    free Ages 11 - 14 45 to 60 minutes
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    In this weather forecasting activity, learners determine the location of cold and warm fronts on weather plot maps. Learners use colored pencils to mark up and analyze surface pressure, air...

    free Ages 8 - 18 45 to 60 minutes

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