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    University of Nebraska State Museum
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    In this activity (on pages 30-36), learners simulate a dig for ancient pollen, to experience how paleobotanists study fossilized pollen in rocks to learn about early geological and climatological...

    $10 - $20 per group Ages 8 - 14 1 to 2 hours
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    University of Illinois Extension
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    In this activity, learners investigate soil conditions by creating a soil map. Learners record soil characteristics and compare the conditions of soil in different grid sections. Use this activity...

    1 cent - $1 per student Ages 4 - 14 1 to 2 hours
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    National Optical Astronomy Observatory
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    In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database. This popular program has generated 100,000...

    free Ages 4 - adult 10 to 30 minutes
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    WGBH
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    In this water activity, learners discover ways to move water across the water table. Learners use various tools including squirt bottles, sponges, and turkey basters to move water from one...

    $5 - $10 per group Ages 4 - 6 10 to 30 minutes
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    University of Nebraska State Museum
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    In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling. Learners...

    $1 - $5 per group Ages 8 - 14 1 to 2 hours
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    WGBH
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    This activity guide features three related explorations to help learners ages 3-6 investigate shadows via the following science concepts: A shadow is made when an object blocks the light; you can...

    $5 - $10 per group Ages 4 - 6 45 to 60 minutes