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    BioEd
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    In this activity, learners create an electrical circuit and investigate how some dissolved substances conduct electricity. Use this activity to explain how the nervous system sends messages as...

    $10 - $20 per group Ages 11 - 14 45 to 60 minutes
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    Howard Hughes Medical Institute
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    This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection by encouraging them to formulate questions that can be answered through scientific...

    $10 - $20 per group Ages 11 - 18 2 to 4 hours
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    Twin Cities Public Television
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    This is an activity (on page 2 of the PDF under Surface Area Activity) about surface area to volume ratio. Learners will bake sugar cookies, testing how much colored sugar is rolled up by 1 large...

    $10 - $20 per group Ages 8 - 14 30 to 45 minutes
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    Astronomical Society of the Pacific
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    In this activity (on page 14 of PDF), learners use a pan full of flour and some rocks to create a moonscape. Then, learners illuminate the moonscape with a flashlight to investigate why scientists...

    $10 - $20 per group Ages 6 - adult 10 to 30 minutes