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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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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer. In doing so, they need to...

    $1 - $5 per group Ages 11 - 14 1 to 2 hours

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