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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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    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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    NOAA
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    In this quick activity, learners observe how salinity and temperature affect the density of water, to better understand the Great Ocean Conveyor. Learners observe what happens when they add...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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    NOAA
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    In this activity, learners explore the different salinities of various sources of water by taste-testing. Learners will taste water samples with the appropriate amount of salinity representing...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    NASA
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    In this activity, learners build models of comets, using edible materials, to learn about comets' structure. Learners then use their senses to simulate a spectrometer to analyze "comets...

    Over $20 per group Ages 6 - 18 45 to 60 minutes
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    New York Hall of Science
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    Discover how the salt in soil affects plant growth with a few seeds, some cotton, and salt. In this hands-on activity, you will plant seeds in 2 different kinds of soil, containing more or less...

    1 cent - $1 per student Ages 6 - 11 1 to 7 days
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    Lawrence Hall of Science
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    In this easy chemistry activity, learners submerge pennies in different liquids (water, lemon juice, vinegar, liquid hand soap, salt water, and baking soda mixed with water) to observe which best...

    $1 - $5 per group Ages 6 - 11 1 to 7 days
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    NOAA
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    In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater. This...

    1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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    New England Aquarium
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    In this activity, learners explore how salt water freezes in comparison to fresh water. Use this experiment to consider how pond animals survive cold winters in comparison to animals that live in...

    1 cent - $1 per group Ages 6 - 14 1 to 2 hours
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    U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy
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    In this activity, learners work in groups to build simple solar stills filled with salt water. After the stills are complete, learners observe what happens when they place the stills in the sun....

    1 cent - $1 per group Ages 4 - 11 45 to 60 minutes

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