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    APSnet
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    In this lab, learners explore Koch's Postulates, the critical step used to prove that a particular microbe is the cause of a specific disease in a host organism (plant or animal). This is...

    Over $20 per group Ages 11 - 18 1 to 4 weeks
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    The Exploratorium
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    This is an activity about acid-base reactions using eggs and vinegar. Learners place eggs inside a container of vinegar and leave to soak overnight. The calcium carbonate of the shell reacts with...

    1 cent - $1 per group Ages 11 - 18 10 to 30 minutes
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    WGBH
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    Learners explore soybeans, soak them in water to remove their coat, and then split them open to look inside. They also make a musical shaker out of paper cups, a cardboard tube, and soybeans. This...

    1 cent - $1 per student Ages 4 - 11 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    Learners work in groups to construct bridges using stale marshmallows and toothpicks. They build bridges inspired by various designs, and then test the strength of the bridge by weighting it down...

    $5 - $10 per group Ages 11 - 14 30 to 45 minutes
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    National Health Museum
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    This laboratory exercise is designed to show learners how DNA can easily be extracted from lima bean bacteria. This experiment requires the use of a centrifuge (not included in cost of materials)....

    $10 - $20 per group Ages 11 - 18 45 to 60 minutes

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