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    Science Museum of Minnesota
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    The Sacred Cenote at Chichén Itzá is a sink hole, or well, containing groundwater. In this activity, learners create their own cenote using chalk, limestone, acids, and rain water. A real cenote is...

    1 cent - $1 per student Ages 6 - adult 10 to 30 minutes
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    Science Friday
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    In this activity, learners perform an experiment to find out what determines a flower's color. Learners extract petal juice, use acid and base indicators, and observe chemical reactions to...

    $10 - $20 per group Ages 11 - 14 45 to 60 minutes
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    University of Washington
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    In this activity, learners use earthworms as "unknown creatures" from the South American jungle to find out how animals use senses. Learners are given supplies to devise their own...

    1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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    BioEd
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    In this activity, learners observe what happens when yeast cells are provided with a source of food (sugar). Red cabbage "juice" will serve as an indicator for the presence of carbon...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    New Jersey Department of Education
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    Over the course of several days, learners explore the property of water that helps plants move water from roots to leaves or gives paper towels the capacity to soak up water. Learners will observe...

    $1 - $5 per group Ages 8 - 14 1 to 7 days
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    Centers for Ocean Sciences Education Excellence
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    In this activity, learners use open inquiry to learn about the process of science as well as gain experience regarding the Law of Conservation of Mass, dissolution, and density. Learners replicate...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    EPA
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    In this activity, learners investigate how increased carbon dioxide (CO2) emissions from the burning of fossil fuels is changing the acidity (pH) of the ocean and affecting coral reefs and other...

    $5 - $10 per group Ages 11 - 14 45 to 60 minutes
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    New Jersey Department of Education
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    Learners explore capillary action in plants (such as plants ability to move water from roots to leaves) in an investigation called Paper Blooms. Placing paper flowers in water mixed with food...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    Railroad Commission of Texas
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    In this activity about global climate change, learners will conduct an experiment and collect data to compare the amount of carbon dioxide (CO2) in four different sources of gases. Learners will...

    $5 - $10 per student Ages 11 - 18 45 to 60 minutes
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    American Museum of Natural History
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    Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide. These two model atmospheres are exposed to light...

    $5 - $10 per group Ages 14 - 18 45 to 60 minutes

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