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    NOAA
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    In this experiment, learners will investigate the release of carbon-containing gas from living and nonliving sources. Learners scratch the surface of a limestone rock and observe what happens when...

    $1 - $5 per student Ages 8 - 14 45 to 60 minutes
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    NOAA
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    In this activity (Lesson 1), learners work in groups to create tide simulations. Learners develop a testing procedure, detail their work in a Laboratory Report, illustrate their simulation and...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes

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