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    The Exploratorium
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    Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces....

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    This is written as a display, but can easily be adapted to a hands-on activity. Learners discover how all the parts of a diaper work together to keep babies dry and comfortable. They can find...

    $1 - $5 per group Ages 6 - 14 5 to 10 minutes
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    Lunar and Planetary Institute
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    In this activity, learners work in pairs to measure each other's ankles with lengths of string. Learners make measurements both before and after lying on their backs with their feet in the air...

    $1 - $5 per group Ages 8 - 14 5 to 10 minutes
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    NISE Network
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    In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors. This is a very fun and...

    $10 - $20 per group Ages 4 - adult 5 to 10 minutes
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    University of Washington
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    In this activity (12th on the page), learners investigate their ability to discriminate (see) different colors. Learners arrange jars, each filled with water and different amounts of food coloring,...

    1 cent - $1 per group Ages 8 - 18 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners observe a sealed test tube containing a small amount of solid stearic acid. Under adult supervision, learners place the test tube into a beaker of hot water and observe the white stearic...

    $5 - $10 per group Ages 11 - 18 5 to 10 minutes
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    The Exploratorium
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    Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere. This activity demonstrates how water can become acidic with the...

    $1 - $5 per student Ages 8 - 18 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities. The molecules of a denser liquid, like chocolate syrup, are arranged more...

    $1 - $5 per student Ages 6 - 14 5 to 10 minutes
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    The Exploratorium
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    Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

    1 cent - $1 per student Ages 8 - 18 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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