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    Lunar and Planetary Institute
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    In this activity, dry ice and other items are used to construct a demonstration model of a comet that illustrates the comet nucleus, coma, and tails. This activity introduces learners to the...

    $10 - $20 per group Ages 8 - 14 30 to 45 minutes
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    Computer Science Unplugged
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    This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships. This activity demonstrates three search...

    1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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    The Exploratorium
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    In this demonstration, cook a cake using the heat produced when the cake batter conducts an electric current. Because of safety concerns, this activity should be conducted as a demonstration only...

    $10 - $20 per group Ages 8 - 18 30 to 45 minutes
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    University of California Museum of Paleontology
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    Learners investigate a pre-constructed mystery tube to determine its interior mechanism. Working in small groups, learners pose explanations (hypotheses) for what they are observing and test their...

    $1 - $5 per student Ages 11 - adult 30 to 45 minutes
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    American Chemical Society
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    Learners will see that changing the shape of an object, like a clay ball, that is more dense than water, can affect whether the object will sink or float. The density of the clay used in this...

    $1 - $5 per student Ages 8 - 14 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners use a pencil, magnets, and mat board to illustrate Newton's Second Law. Learners will observe as gravitational and magnetic forces act on two falling objects to...

    1 cent - $1 per student Ages 11 - 18 30 to 45 minutes
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    COSI
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    In this health activity (on page 3 of the PDF), learners will learn about the body‘s defenses against invasion from tiny particles. They will make their own "snot" and see firsthand how...

    $10 - $20 per group Ages 8 - 14 30 to 45 minutes
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    NEON, Inc.
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    In this activity/demonstration, learners explore pollen and how insects and animals transport pollen. Learners investigate and compare wind and animal pollination. The suggested extension...

    $5 - $10 per group Ages 6 - 11 30 to 45 minutes
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    American Chemical Society
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    In this activity, learners explore the process of condensation. After seeing water vapor condense, learners will help design a test to see if cooling water vapor has an effect on the rate of...

    1 cent - $1 per group Ages 6 - 14 30 to 45 minutes
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    The Exploratorium
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    In this activity, a lightbulb is placed in front of a concave mirror. The actual lightbulb is not visible to the viewer, but the viewer can see the mirror image of the lightbulb formed in space....

    Over $20 per group Ages 8 - 14 30 to 45 minutes

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