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    National Health Museum
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    In this activity, learners calculate the number of milliliters of water a nearby tree transpires per day. First, teams of learners go outdoors to collect five leaves from a mulberry or cottonwood...

    $1 - $5 per group Ages 14 - 18 4 to 24 hours
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    National Aeronautics and Space Administration
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    In this activity, learners discover how sediment is affected in an oil spill. Learners investigate the differences between heavy and light oil as well as the differences between different sediments...

    $5 - $10 per group Ages 8 - 11 10 to 30 minutes
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    NOAA
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    In this 7-10 day investigation, learners develop an understanding of waves and tides and their motion through discussion, demonstration, and hands-on activities. Learners demonstrate wave motion in...

    $1 - $5 per group Ages 11 - 14 1 to 4 weeks