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    Carleton College
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    In this activity, learners use Styrofoam to collect organisms from a pond, estuary or marine environment and then examine what they have caught with a microscope. The tiny spaces in Styrofoam...

    $1 - $5 per group Ages 8 - 18 1 to 7 days
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    American Association for the Advancement of Science
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    In this version of tag, a large group of learners model how the body fights infection. Learners act as germs, as lymphocytes, and as the body's cells threatened by germs. After playing one...

    $1 - $5 per group Ages 8 - 11 30 to 45 minutes
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    National Health Museum
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    This laboratory activity helps learners understand the concept of biological succession by simulating the process in a microenvironment with various protozoans. By manipulating environmental...

    Over $20 per group Ages 14 - 18 1 to 12 months
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    American Chemical Society
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    In this activity on page 7 of the PDF (Get Cooking With Chemistry), learners conduct an experiment to get an idea of how cheese is made. Learners discover that cheese is made by adding either an...

    $5 - $10 per student Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this long-term activity, learners make a home for a colorful community of microorganisms. Over the course of several weeks or more, learners will see colors appear and shift as the microbial...

    $5 - $10 per student Ages 8 - 18 1 to 4 weeks
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    California Academy of Sciences
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    In this activity, learners conduct a scientific investigation involving decomposition and discover that the life cycle of trash is affected by its organic or inorganic nature. Learners develop...

    free Ages 6 - 14 1 to 12 months