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    University of Washington
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    In this activity (1st on the page), learners explore circadian rhythms by keeping track of their body temperature. Learners measure their temperature using a standard oral thermometer every two...

    1 cent - $1 per student Ages 8 - 18 4 to 24 hours
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    NOAA
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    In this experiment, learners examine the way oil affects bird feathers and test different cleanup methods to find out which works best. Learners answer questions throughout the investigation,...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    Bill Nye
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    In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan. As the water in the damp sock evaporates, it makes...

    free Ages 4 - 14 5 to 10 minutes
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    Bill Nye
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    In this activity, learners explore the behavior of cold-blooded animals. Learners discover what happens when they change a fly's temperature. Young learners would enjoy this activity, but...

    $1 - $5 per group Ages 4 - 14 45 to 60 minutes
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    NSBRI
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    In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants. They will observe that some behaviors and functions of living...

    $1 - $5 per group Ages 8 - 14 1 to 7 days
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    Community Science Workshop Network
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    Cool off in the heat with this project! Learners use simple materials to build a fan that runs on a motor. This activity introduces learners to circuits and switches as well as conduction and...

    $5 - $10 per student Ages 8 - 18 10 to 30 minutes
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    Lawrence Hall of Science
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    In this outdoor winter activity, learners search for and create hibernation sites that will protect gelatin "animals" from freezing. Learners come to understand that hibernating animals...

    $1 - $5 per group Ages 6 - 14 45 to 60 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners measure familiar objects in nature to practice working with the metric system. The goal is for learners to develop their "metric senses" by measuring...

    $10 - $20 per group Ages 6 - 14 45 to 60 minutes
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    Lawrence Hall of Science
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    In this outdoor activity/game, learners use thermometers to simulate how lizards survive in habitats with extreme temperatures. Learners are challenged to keep their thermometer-lizard "alive...

    $5 - $10 per group Ages 8 - 18 45 to 60 minutes