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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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    Lawrence Hall of Science
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    In this outdoor activity, learners find out the color of food that jays prefer and then try to change the birds' preference by altering the taste of the food with salt. Learners consider how...

    $10 - $20 per group Ages 8 - 14 45 to 60 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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    Lawrence Hall of Science
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    In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper....

    $10 - $20 per group Ages 8 - 18 45 to 60 minutes
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    APSnet
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    The purpose of this plant biotechnology activity is to demonstrate the effect of changes in the environment on the growth and fertility of landscape grasses and crop grasses such as wheat and rice....

    $10 - $20 per group Ages 11 - 18 45 to 60 minutes
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    University of Utah
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    In this activity, learners examine how brine shrimp populations can survive in some of the harshest environments. Learners subject brine shrimp cysts to extreme conditions to evaluate the hardiness...

    Over $20 per group Ages 11 - 18 1 to 7 days
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    University of Utah
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    What is the optimal environment for hatching brine shrimp? Using a scaffold, learners design and conduct experiments testing the effect of a single abiotic factor on brine shrimp cyst hatch rate....

    Over $20 per group Ages 11 - 18 1 to 7 days
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    Centers for Ocean Sciences Education Excellence
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    In this activity, learners explore density, convection, stratification, and, by inference, the melting of icebergs. Learners make hypotheses, test their hypotheses, and explain their observations.

    1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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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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    California Academy of Sciences
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    In this activity, learners visualize the differences in water density and relate this to the potential consequences of increased glacial melting. This activity can be conducted as a demonstration...

    $5 - $10 per group Ages 8 - 14 2 to 4 hours

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