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In this lesson plan, learners examine some of the of greenhouse gas emissions sources in their community.

free Ages 11 - 14 45 to 60 minutes
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In this activity (p.5-6 of PDF), learners investigate natural selection. Learners discover that natural selection, which takes place over decades, can lead to altered populations within a species.

$5 - $10 per group Ages 8 - 11 10 to 30 minutes