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    COSI
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    In this environmental science activity (page 3 of the PDF), leaners will identify and explain the causes of erosion. They will observe the effects of erosion on the surrounding area and further...

    Over $20 per group Ages 8 - 11 1 to 7 days
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    COSI
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    In this environmental education demonstration (page 6 of the PDF), learners will see a tangible representation of the scarcity of soil resources on earth. They will gain perspective on the ways in...

    $1 - $5 per group Ages 8 - 11 10 to 30 minutes

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