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    American Chemical Society
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    In this activity, learners add objects and substances to carbonated water to discover that added objects increase the rate at which dissolved gas comes out of solution. Learners are then challenged...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Community Science Workshop Network
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    In this activity, learners experiment with the density of ice, water, and oil. Learners will discover that the density of a liquid determines whether it will float above or sink below another...

    $1 - $5 per student Ages 6 - 11 10 to 30 minutes
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    University of Washington
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    In this activity (7th activity on the page), learners use their sense of hearing to find a "sound match." Learners shake containers filled with items like dry seeds, sand, beans, etc. and...

    $1 - $5 per group Ages 4 - 14 5 to 10 minutes
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    Twin Cities Public Television
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    This is a quick activity (on page 2 of the PDF) that illustrates how nanoscale structures, so small they're practically invisible, can produce visible/colorful effects. Learners will use clear...

    $1 - $5 per group Ages 8 - 14 10 to 30 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners use only their senses to to find the extremes of several environmental variables or physical factors: wind, temperature, light, slope and moisture. Learners also...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    Astronomical Society of the Pacific
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    This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope. They will learn about how the eye works, how to use the...

    $1 - $5 per group Ages 4 - adult 5 to 10 minutes
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    IEEE
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    In this activity, learners explore how engineering has impacted the development of bridges over time, including innovative designs and the challenge of creating bridges that become landmarks for a...

    $1 - $5 per group Ages 8 - 18 1 to 2 hours
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    NISE Network
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    This hands-on activity demonstrates how a material can act differently when it's nanometer-sized. Learners compare the reaction rate of an effervescent antacid tablet that is broken in half...

    $1 - $5 per group Ages 6 - adult Under 5 minutes
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    COSI
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    In this combination chemistry and physics activity, learners explore water absorption in dried beans or peas and learn how this affects their physical properties. They observe changes in size, skin...

    $1 - $5 per student Ages 6 - 11 1 to 7 days
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    Museum of Science and Industry, Chicago
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    Learners use chromatography to separate and analyze the mixture of pigments in leaves. Use this activity to discuss photosynthesis as well as why leaves change color in autumn. Safety note: Nail...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes

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