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In this activity, learners will explore the water cycle by creating a small atmosphere.

$1 - $5 per group Ages 4 - 11 1 to 2 hours
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Working in groups, learners model the continuous destruction and creation of ozone (O3) molecules, which occur in the ozone layer.

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