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    Pratt School of Engineering, Duke University
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    Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days. By weighing the gum before and after chewing, they can determine the amount of mass...

    $1 - $5 per group Ages 11 - 14 2 to 4 hours
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    American Chemical Society
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    Learners design their own experiment to investigate whether the temperature of the surrounding water affects the rate at which the colored coating dissolves from an M&M. When they conduct their...

    $1 - $5 per group Ages 4 - 14 30 to 45 minutes
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    American Chemical Society
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    In this activity, learners explore the process of condensation. After seeing water vapor condense, learners will help design a test to see if cooling water vapor has an effect on the rate of...

    1 cent - $1 per group Ages 6 - 14 30 to 45 minutes
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    American Chemical Society
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    This three-part activity consists of an activity that groups of learners develop themselves, a given procedure, and an optional demonstration. First, learners discuss examples of evaporation and...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    American Physical Society
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    Learners build a pendulum from a yo-yo, and then design their own experiment to determine what affects the pendulum's period of swing. They can alter the mass of the yo-yo by adding play dough...

    $1 - $5 per group Ages 11 - 14 45 to 60 minutes
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    American Chemical Society
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    Learners create hard water by mixing Epsom salt and water. Then they compare what happens when soap solution is mixed with hard water and regular water. The precipitate that forms from soap and...

    $1 - $5 per group Ages 6 - 14 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