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    Sciencenter
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    In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain. With this understanding, they try to find a combination of chemicals that could be used to...

    $10 - $20 per group Ages 4 - 14 10 to 30 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture. After a period of days or weeks, learners see the effect acid has on...

    $10 - $20 per group Ages 8 - 14 1 to 4 weeks
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    Sciencenter
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    In this challenge, learners figure out how to make a juice stain disappear. (Younger learners will definitely need assistance, and safety instructions are included in the PDF.) First they...

    $10 - $20 per group Ages 4 - 14 30 to 45 minutes
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    NASA
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    In this activity, learners discover how geologists use stratigraphy, the study of layered rock, to understand the sequence of geological events. Learners use baking soda, vinegar, and different...

    $10 - $20 per group Ages 8 - 18 1 to 2 hours
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    Lunar and Planetary Institute
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    In this activity, learners create volcanoes like those they have examined on Earth and Mars through images taken by spacecraft. Using baking soda and vinegar, learners model volcanic eruptions and...

    $10 - $20 per group Ages 8 - 14 10 to 30 minutes
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    WGBH
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    This series of chemistry stations is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Each of the six stations features either a...

    $10 - $20 per group Ages 11 - adult 45 to 60 minutes
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    Mount Holyoke College
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    In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch. Learners test cream of tartar, baking soda, lemon...

    $10 - $20 per student Ages 4 - 8 10 to 30 minutes
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    WGBH
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    In this hands-on science experiment, students combine their understanding of the different states of matter and the characteristics of various chemical reactions. Learners also use the scientific...

    $10 - $20 per group Ages 6 - 11 45 to 60 minutes
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    American Chemical Society
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    In this activity on page 2 of the PDF, learners conduct chemical tests on certain powders used in cooking. After completing the tests, learners try to figure out the identity of a mystery powder....

    $10 - $20 per student Ages 8 - 14 45 to 60 minutes
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    The Exploratorium
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    In this activity, learners try to figure out who has their matching rock type by reading a description of their rock (no talking!). This activity can be used in a variety of ways: to introduce...

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes

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