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    Twin Cities Public Television
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    This outdoor activity (on page 2 of the PDF under SciGirls Activity: Sand Dunes) is a full inquiry investigation into how the amount of moisture in a sand dune relates to the number of plants...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    Climate Change North
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    In this very hands-on lesson, learners will investigate dendrochronology (the study of tree rings to answer ecological questions about the recent past) and come up with conclusions as to what...

    1 cent - $1 per group Ages 8 - 14 2 to 4 hours