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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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    COSI
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    In this life science activity (page 8 of the PDF), learners explore the carbon cycle by mixing yeast, sugar and water. Learners observe how different quantities of the mixture produce more or less...

    Over $20 per group Ages 8 - 14 1 to 2 hours
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    Lawrence Hall of Science
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    In this outdoor activity, learners use a "litter-critter" wheel to help them identify different animals they find living in a natural litter habitat. Learners also become familiar with...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes