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    NOAA
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    In this game, learners walk through an imaginary Carbon Cycle and explore the ways in which carbon is stored in reservoirs and the processes that transport the carbon atom from one location to...

    free Ages 11 - 18 45 to 60 minutes
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    PhET
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    In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping. Learners can even slow time and transport...

    free Ages 8 - adult 10 to 30 minutes
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    Rensselaer Polytechnic Institute
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    This online interactive has three activities in the NanoLab (press the upper right button): Build, Zoom, and Transform. In Build, learners build increasingly complex molecules out of carbon, oxygen...

    free Ages 4 - adult 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 8 of the PDF, learners make a slimy substance very similar to mucus, and sprinkle it with glitter to imitate the way that allergens are trapped. Use this activity to...

    $5 - $10 per student Ages 6 - 18 10 to 30 minutes
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    PhET
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    In this online interactive simulation, learners will add different salts to water and then watch the salts dissolve and achieve a dynamic equilibrium with solid precipitate. Learners will also...

    free Ages 8 - adult 10 to 30 minutes
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    Astronomical Society of the Pacific
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    This simple and engaging astronomy activity explains nuclear fusion and how radiation is generated by stars, using marshmallows as a model. Learners will explore what cosmic radiation is and where...

    $1 - $5 per group Ages 8 - adult 5 to 10 minutes
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    PhET
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    In this online interactive simulation, learners will test the pH of liquids like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Learners will visualize the relative...

    free Ages 11 - adult 10 to 30 minutes
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    Astronomical Society of the Pacific
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    This fun and simple hands-on astronomy activity lets learners explore what happens when a star explodes. Participants imagine themselves inside a large star at the end of its life, just as it is...

    $5 - $10 per group Ages 8 - adult Under 5 minutes
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    CSIRO
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    In this activity, learners use a flashlight, a glass of water, and some milk to examine why the sky is blue and sunsets are red. Learners will discover that the sky appears a different color...

    1 cent - $1 per group Ages 11 - 18 5 to 10 minutes
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    The Exploratorium
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    In this edible experiment, learners pour "Magic Shell" chocolate into a glass of cold water. They'll observe as pillow shaped structures form, which resemble lavas on the sea floor.

    $1 - $5 per student Ages 8 - 18 5 to 10 minutes

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