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    American Chemical Society
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    In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light. Examine how the more UV rays there are, the...

    $5 - $10 per student Ages 6 - 14 10 to 30 minutes
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    Twin Cities Public Television
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    This activity (on page 3 of the PDF under GPS: Baseball Activity) is a full inquiry investigation into how "bounciness" relates to the distance a ball will fly when hit off a batting tee....

    $5 - $10 per group Ages 8 - 14 1 to 2 hours

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