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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 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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    The Exploratorium
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    Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    The Exploratorium
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    Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

    1 cent - $1 per student Ages 6 - 18 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Extract your DNA from your very own cells! First, learners swish salt water in their mouth to collect cheek cells and spit the water into a glass. Then, learners add liquid dishwashing detergent...

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    The Exploratorium
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    In this science trick, learners get an egg to stand-up on its long-axis vertical to a table's top. Learners use salt grains, which are virtually unnoticeable to viewers, to give an egg's...

    1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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    COSI
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    In this biology activity, learners recreate the process of digestion in a zip lock bag. A bit of soda pop added to some crumbled crackers approximates how acids in the stomach dissolve food. This...

    1 cent - $1 per student Ages 8 - 11 5 to 10 minutes