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    Twin Cities Public Television
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    This activity (located on page 3 of the PDF) is a full inquiry investigation into tree growth rates. Groups of learners will count tree rings to determine each tree’s age. A thorough sample of...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes
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    University of Nebraska State Museum
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    In this graphing activity (on pages 33-40), learners investigate how much and what kinds of food sea otter pups eat during their first year of life. Learners discover that young sea otters eat more...

    1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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    Lawrence Hall of Science
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    In this outdoor activity, learners discover how the environment around a building affects the growth of plants. Learners observe patterns of plant growth such as size, thickness, weeds, and damage...

    $1 - $5 per group Ages 6 - 18 30 to 45 minutes
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    Science Museum of Minnesota
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    This website contains an activity PDF and a video. The PDF is an activity printout for learners to gather femur measurements and ages of their family members. Learners then to use this data to...

    1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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    Educational Development Center, Inc.
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    In this indepth hands-on activity, learners build a structure that allows them to observe the growth of roots and the correlation between root growth and stem extension. Because no dirt is used in...

    $10 - $20 per group Ages 8 - 14 1 to 4 weeks
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    The Exploratorium
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    In this hands-on botany activity, learners sprout vegetables in film canisters. Learners grow nine seeds each of cabbage, radish, and parsley, experimenting with changing one variable (light, water...

    1 cent - $1 per student Ages 4 - 11 1 to 4 weeks
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    Bryn Mawr College
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    In this laboratory activity, learners design an experiment to evaluate how environmental factors influence the growth of molds. Suggested questions to investigate include: (1) Does mold grow faster...

    $5 - $10 per group Ages 11 - 18 1 to 7 days
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    PBS
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    In this "Sid the Science Kid" activity, learners observe how plants change as they grow. Learners examine the effects of growth by measuring and recording changes in plants over days and...

    $5 - $10 per group Ages 4 - 6 1 to 4 weeks
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    Biotechnology and Biological Sciences Research Council
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    In this activity, learners determine the necessary conditions for pea seed germination. This activity encourages learners to make predictions and think about how they might investigate the effects...

    $5 - $10 per group Ages 8 - 11 1 to 7 days
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    Lawrence Hall of Science
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    In this outdoor, windy day activity, learners "fly" and race leaves along a line to discover which types of leaves catch the most wind. Which leaves are the best fliers? Why? Learners...

    $1 - $5 per group Ages 6 - 14 45 to 60 minutes

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