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    New York Hall of Science
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    Does yeast breathe? Find out by watching how plastic bags filled with yeast, warm water and different amounts of sugar change over time. Demonstrate the interaction of microorganisms and the carbon...

    $1 - $5 per student Ages 6 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this activity, learners identify different plastics in a mystery bag. Learners discover that plastics are classified #1 through #7. Learners then categorize plastics based on characteristics...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    In this activity, learners conduct a waste audit and use their findings to implement a plan for reducing trash. Learners measure trash, sort by categories (compostable, recyclable, etc.) and...

    $5 - $10 per group Ages 8 - 14 1 to 2 hours
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    Oregon Museum of Science and Industry
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    Learners compare the properties and solubilities of Styrofoam (TM), ecofoam packing peanuts, and popcorn. First, the solubility of each substance is tested in water. A drop of iodine is added to...

    1 cent - $1 per group Ages 11 - adult Under 5 minutes
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    New York Hall of Science
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    In this activity, learners simulate the separation techniques that materials recovery facilities (MRFs) use and then design their own series of recycling techniques. Learners identify four ways...

    $1 - $5 per group Ages 11 - 14 1 to 2 hours
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    University of Illinois Urbana-Champaign
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    In this activity, learners test and compare the physical properties of thermoplastic polymers. Learners compare different plastics based on their color, degree of transparency, texture, and density...

    $1 - $5 per group Ages 14 - adult 30 to 45 minutes
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    National Health Museum
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    In this cooperative learning activity, learners visit ten stations and are challenged to think critically about various conservation questions and issues. Learners work together to examine...

    $10 - $20 per group Ages 14 - 18 45 to 60 minutes
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    Association of Zoos and Aquariums
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    In this activity, learners discover the three R's of environmental protection: reduce, reuse, and recycle. Over a two day period, learners audit their home or school and start a recycling...

    free Ages 8 - 18 1 to 7 days
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    Science Museum (London)
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    In this activity, learners take a boring polystyrene cup and turn it into something a little more interesting! Learners dissolve a polystyrene cup and remold the material into something new like...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes