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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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    Oregon Museum of Science and Industry
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    Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel. They detect the electricity the battery makes by listening to it on a...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater. Therefore, the ball floats on top...

    $1 - $5 per student Ages 6 - 14 5 to 10 minutes
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    Institute of Physics
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    This is a highly visual demonstration that illustrates both the effects of density and chemical reactions. Like a density column, volcano eruption, and Alka-seltzer reaction all in one, learners...

    $1 - $5 per group Ages 4 - adult 5 to 10 minutes
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    WGBH
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    In this activity, learners mix up a bubbly brew and examine density. Learners explore how they can make different materials fall and rise in water using oil, water, and salt. Learners can...

    $1 - $5 per student Ages 6 - 11 5 to 10 minutes
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    The Exploratorium
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    In this activity, learners follow a recipe to make hollandaise sauce. Learners discover how cooks use egg yolks to blend oil and water together into a smooth mix. In chemistry, this mixture is...

    $1 - $5 per group Ages 6 - 14 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this chemistry demonstration, acid rain is simulated in a petri dish. Sodium sulfite (NaSO3) and hydrochloric acid (HCl) are mixed to create sulfur dioxide gas (SO2), which is a common byproduct...

    $1 - $5 per group Ages 14 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this chemistry activity, learners fill two test tubes with a solution of "artificial stomach fluid," consisting of hydrochloric acid in the same concentration as in human stomachs,...

    $1 - $5 per group Ages 14 - adult 5 to 10 minutes