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    Science Museum of Minnesota
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    In this activity, learners will investigate the sounds of the heart. Learners construct two stethoscopes, one out of paper and another made from vinyl tubing and a plastic bottle, and investigate...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    NSBRI
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    In this activity about how the body regulates blood pressure (page 117 of the PDF), learners make and compare measurements of heart rate and blood pressure from three body positions: sitting,...

    1 cent - $1 per group Ages 8 - 18 30 to 45 minutes