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    The Exploratorium
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    In this hands-on botany activity, learners sprout vegetables in film canisters. Learners grow nine seeds each of cabbage, radish, and parsley, experimenting with changing one variable (light, water...

    1 cent - $1 per student Ages 4 - 11 1 to 4 weeks
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    The Exploratorium
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    In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun. Learners construct the photometer by making a grease spot on white paper...

    1 cent - $1 per student Ages 14 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners calculate the percentage of oxygen in the atmosphere by using steel wool's ability to rust. Learners measure the volume of a test tube with a small amount of steel...

    1 cent - $1 per student Ages 11 - 18 1 to 7 days