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    American Chemical Society
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    In this activity on page 4 of the PDF, learners conduct some quick and easy tests to determine the differences between water and other liquids that look very similar to water. Learners compare how...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Community Science Workshop Network
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    In this activity, learners extract DNA from a strawberry and discover that DNA is in the food they eat. Learners use simple materials to break open the cells of a strawberry and see DNA with their...

    $1 - $5 per student Ages 11 - 14 45 to 60 minutes
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    Mount Holyoke College
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    In this experiment, learners separate different types of molecules in marker inks (using a technique called "thin layer chromatography"). Learners mark dots at the bottom of a strip of...

    $1 - $5 per student Ages 4 - 8 30 to 45 minutes
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    Pratt School of Engineering, Duke University
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    Learners initially test to see how many drops of liquid (water, rubbing alcohol, and vegetable oil) can fit on a penny. They then generate their own hypotheses to explain the results and design...

    $1 - $5 per group Ages 11 - 14 10 to 30 minutes
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    Make
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    In this activity, learners make a small batch of biodiesel that will work in any diesel engine. Learners use an old juice bottle as a "reactor" vessel to chemically process vegetable oil...

    $10 - $20 per group Ages 14 - adult 1 to 7 days
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density...

    $5 - $10 per group Ages 11 - 14 30 to 45 minutes
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    The Exploratorium
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    In this activity, learners separate the components of Gatorade using a home-made affinity column. In doing so, learners model the basic principle of affinity chromatography, a technique used to...

    $10 - $20 per student Ages 11 - 18 45 to 60 minutes