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    COSI
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    In this yummy activity about soil (page 9 of PDF), learners will create layers of soil using food. They will learn about the composition and role of each layer. Though this was created as a post...

    $1 - $5 per student Ages 8 - 11 30 to 45 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners make their own organic-rich soil. Depending on where this activity is done, learners will probably discover that their local soil is low in organic matter. Then...

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes
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    Twin Cities Public Television
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    This is an activity (located on page 3 of the PDF) about nanotechnology making its way into everyday products, such as sunscreen, and how effective these invisible particles may be vs. their old...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    Oregon Museum of Science and Industry
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    Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it. Leaners discover earth materials such as sand and dirt can be used...

    $1 - $5 per group Ages 11 - 18 30 to 45 minutes