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    The Exploratorium
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    In this activity, learners balance chemical equations and discover the law of conservation of mass. Learners use coins to model molecules to balance the equations.

    free Ages 14 - 18 10 to 30 minutes
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    University of Washington
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    In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste. Learners dry their tongues with clean paper towels and then taste samples of salt,...

    $1 - $5 per group Ages 8 - 18 5 to 10 minutes
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    American Museum of Natural History
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    Learners work in teams to investigate how scientists use physical characteristics to classify living things. First, learners examine drawings of a variety of leaves from different species of oak...

    free Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    In this hands-on activity, learners make the world's simplest Cartesian diver, using only a plastic bottle, some water, and a condiment packet. A Cartesian diver is a classic science...

    free Ages 6 - adult 5 to 10 minutes
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    The Science House
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    In this chemistry activity, learners make indicator solution from red cabbage. Then, learners test everyday foods and household substances using the cabbage juice indicator. Learners will record...

    $5 - $10 per group Ages 11 - 18 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    Using yeast, sugar, and water, learners create a chemical reaction which produces carbon dioxide (CO2) gas inside a 2-liter bottle. They use this gas to inflate a balloon. This reaction shows the...

    $1 - $5 per student Ages 6 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners measure and calculate the amount of cubic feet various containers contain. Next, learners investigate cubic feet per second (cps), by carrying jugs in one second. This...

    free Ages 11 - 18 45 to 60 minutes
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    University of Washington
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    In this activity (1st on the page), learners explore circadian rhythms by keeping track of their body temperature. Learners measure their temperature using a standard oral thermometer every two...

    1 cent - $1 per student Ages 8 - 18 4 to 24 hours
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    The Science House
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    In this chemistry demonstration, learners investigate the factors that increase the rate of dissolution for a solid. Learners will compare how crushing sugar cubes, stirring and water temperature...

    1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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    Computer Science Unplugged
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    This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed. A group of learners will calculate their average age without anyone...

    1 cent - $1 per group Ages 11 - adult 5 to 10 minutes

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