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    NOAA
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    In this activity, learners experiment and observe how the color of materials that cover the Earth affects the amounts of sunlight our planet absorbs. Use this activity to begin discussions on...

    1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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    NOAA
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    In this activity, learners are introduced to tree rings by examining a cross section of a tree, also known as a “tree cookie.” They discover how tree age can be determined by studying the rings and...

    1 cent - $1 per group Ages 8 - 18 45 to 60 minutes