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    The Science House
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    In this chemistry activity, learners use the lowered freezing point of water to chill another mixture (ice cream) to the solid state. Learners will record the temperature of the ice before and...

    $1 - $5 per student Ages 6 - 18 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 12 of the PDF, learners examine how recyclable materials are separated by various properties at recycling centers. Learners determine the density of various objects as well...

    $5 - $10 per student Ages 8 - 14 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    In this chemistry lab activity, learners model the colors of fireworks by burning metallic solutions in a flame and observing the different colors produced. The color is determined by the...

    $5 - $10 per group Ages 14 - adult Under 5 minutes
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    National Health Museum
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    This laboratory exercise is designed to show learners how DNA can easily be extracted from onion cells. It includes an optional test for the presence of DNA. Use this experiment to supplement any...

    $5 - $10 per group Ages 11 - 18 45 to 60 minutes
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    The Exploratorium
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    In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern. With...

    $5 - $10 per group Ages 11 - 18 1 to 2 hours
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    APSnet
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    In this biology activity, learners use plastic pipettes to cut wells into the solid gel layer of agar in petri dishes and place solutions of simulated antigen and antibody preparations into the...

    Over $20 per group Ages 14 - 18 45 to 60 minutes
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    KCET
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    This open-ended art project allows learners to create their own colorful ice sculpture by using rock salt and food coloring on a solid block of ice. The entire activity is like a mini-science...

    $1 - $5 per student Ages 4 - 8 10 to 30 minutes
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    Lawrence Hall of Science
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    In this earth science/math/art activity, learners use simple ingredients to grow crystals and examine the repeating geometric shapes and patterns. Learners compare the growth of crystals from four...

    $5 - $10 per group Ages 6 - 14 1 to 4 weeks
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    COSI
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    In this activity, learners explore why frost forms. They create their own frost using a solution of ice water and salt in a glass. The salt allows the temperature of the water to drop below the...

    1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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    NOAA
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    In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream. Pairs of learners will combine ingredients in a plastic bag and then add...

    $5 - $10 per group Ages 6 - 14 30 to 45 minutes

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