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    American Chemical Society
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    In this experiment, learners try different liquids to see which ones clean pennies best. Liquids to try include water, lemon juice, cola, vinegar, and dishwashing detergent. Suggested extensions...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Perkins School for the Blind
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    This activity was designed for blind learners, but all types of learners can participate to learn about conservation of gas. This is one of the classic experiments using baking soda and vinegar....

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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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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    COSI
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    In this chemistry activity, learners will test the pH of various foods and household substances using cabbage. They will explore the concept of acidic and basic chemicals, learn that pH is a common...

    $5 - $10 per group Ages 8 - 11 10 to 30 minutes
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    COSI
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    In this chemistry activity (page 6 of the PDF), learners observe a chemical change. Learners write and reveal a secret message using edible ink. Learners use their critical thinking skills to...

    $5 - $10 per group Ages 8 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    This activity uses turmeric, a common spice in curry, as an indicator for acidity and basicity. Turmeric is yellow in acid and neutral substances, but turns bright red with bases. Learners can use...

    $1 - $5 per student Ages 11 - 14 10 to 30 minutes