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    WGBH
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    In this activity, explore chromatography and the various colors that make up the ink in markers. Use this activity to investigate cohesion and adhesion. The online version of this activity is set...

    1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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    WGBH
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    In this activity, challenge learners to float a paper clip in a cup of water. Learners discover that a paper clip will sink in a cup of water, except when it is placed on a piece of paper towel....

    1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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    In this activity, challenge learners to predict and investigate how many water drops they can fit on one penny. Learners conduct the test three times to find the average number of drops they can...

    free Ages 6 - 11 10 to 30 minutes