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    American Association for the Advancement of Science
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    Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust. They blow bubbles into water, then use an indicator (bromothymol blue) to see that the water...

    1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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    American Museum of Natural History
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    In this experiment using sprigs of Elodea, learners will observe a natural process that removes carbon dioxide (CO2) from Earth's atmosphere. This process is a part of the carbon cycle and...

    $10 - $20 per group Ages 11 - 14 1 to 2 hours
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this demonstration, learners compare and contrast regular water ice to dry ice (frozen carbon dioxide). Both samples are placed in a solution of acid-base indicator. The regular ice floats and...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas. The CO2 gas is trapped in a balloon, then blown through a straw into water with an acid...

    1 cent - $1 per group Ages 8 - 14 5 to 10 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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    Community Science Workshop Network
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    In this activity, learners test exhaled breath for carbon dioxide and learn how to use an indicator as a simple way to measure pH. Learners also explore what happens when an acid (lemon) is mixed...

    $5 - $10 per student Ages 8 - 18 10 to 30 minutes
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    NOAA
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    In this experiment, learners will investigate the release of carbon-containing gas from living and nonliving sources. Learners scratch the surface of a limestone rock and observe what happens when...

    $1 - $5 per student Ages 8 - 14 45 to 60 minutes
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    The Exploratorium
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    Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere. This activity demonstrates how water can become acidic with the...

    $1 - $5 per student Ages 8 - 18 5 to 10 minutes
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    The Exploratorium
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    Ocean acidification is a big issue due to the amount of carbon dioxide humans release. CO2 in the atmosphere is absorbed into the ocean thus changing its acidity. The more acidic the ocean becomes,...

    $1 - $5 per student Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator. This activity also has helpful...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes

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