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    In this activity, learners explore how the area of Arctic sea ice has changed over recent years. First, learners graph the area of Arctic sea ice over time from 1979 to 2007. Then, learners use...

    free Ages 11 - 18 45 to 60 minutes
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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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    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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    In this weather forecasting activity, learners determine the location of cold and warm fronts on weather plot maps. Learners use colored pencils to mark up and analyze surface pressure, air...

    free Ages 8 - 18 45 to 60 minutes

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