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This three-part lab helps learners understand the essential principles governing diffusion and osmosis.

Over $20 per group Ages 14 - 18 4 to 24 hours
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This display shows slow chemical reactions in colorful crystal formations known as Liesegang Rings. These reactions are similar to those forming the rings in agates.

$5 - $10 per student Ages 14 - adult 1 to 4 weeks