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In this activity, learners investigate diffusion by creating underwater "fireworks" using food coloring, oil and water.

$1 - $5 per student Ages 6 - 11 5 to 10 minutes
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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