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    Oregon Museum of Science and Industry
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    Learners write an invisible message using lemon juice on a piece of paper. They then develop the message by soaking the paper in a dilute iodine solution. The iodine stains the paper blue, but the...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this experiment, learners will conduct chemical and physical tests to identify mystery substances. This experiment is very flexible, allowing educators to determine the number of unknowns to...

    $5 - $10 per group Ages 8 - 14 45 to 60 minutes
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    American Chemical Society
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    In this activity, learners will develop a method to test five similar-looking powders (baking soda, baking powder, cream of tartar, detergent, and cornstarch) with four test liquids (water, vinegar...

    $1 - $5 per group Ages 6 - 14 45 to 60 minutes
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    Twin Cities Public Television
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    This is an activity (located on page 3 of the PDF) about the use of reduction agents to decontaminate ground water. Learners will conduct a reduction-oxidation (redox) reaction in which vitamin C...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours
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    Oregon Museum of Science and Industry
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    Learners are given mysterious white powders and have to determine their identity with chemical tests. This resource includes background information about how to identify detergent, citric acid,...

    $1 - $5 per group Ages 11 - adult 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    In this activity, learners investigate vitamin C. Using a simple starch and iodine demonstration, learners discover that vitamin C is an antioxidant, and protects us by reacting with toxic...

    $5 - $10 per group Ages 8 - adult Under 5 minutes
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    COSI
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    In this chemistry activity (page 3 of the PDF), learners will observe a chemical change, specifically what happens to iodine when it is applied to ripe and unripe apples. From the reaction of...

    Over $20 per group Ages 8 - 14 10 to 30 minutes
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    BioEd
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    In this activity related to microbes, learners make slides of cells from an onion skin and Elodea (American or Canadian waterweed) to observe under a microscope. With these examples, learners will...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    My Science Box
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    In this activity, learners conduct tests for proteins, glucose, and starch. At the beginning of the activity, learners choose three items to test: one known to be “never alive," one known to...

    Over $20 per group Ages 11 - 18 1 to 2 hours