Bottle Organ

1. Bottle Organ Materials: Identical bottles with different water levels What you do: Blow across bottle tops. What students see: Different notes come from different air-space lengths. Question: How is this different from tapping the bottles? 2. Skittles Rainbow Ring Materials: White plate; warm water; Skittles What you do: Arrange candies in ring and add shallow water. What students see: Colored stripes spread inward. Question: Why do the colors stay in lanes for a while? 3. Water-Drop Magnifier Materials: Clear plastic sheet; printed tiny text; dropper; water What you do: Place a round water drop above small print. What students see: Text appears enlarged. Question: Can water become a magnifying glass?

Predict → observe three demonstrations → compare what changed → choose independent activity station → cleanup/share. Guiding questions: Question: How is this different from tapping the bottles? Question: Why do the colors stay in lanes for a while? Question: Can water become a magnifying glass?