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Radioactive-Decay Model: Substitute coins for radiation
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Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.
Atmosphere Composition Model
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In this activity, learners create a model using metric measuring tapes and atmosphere composition data.
Chemistry Makes Scents
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In "Chemistry Makes Scents," participants use their noses to distinguish between chemicals with very similar structures.