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In this activity, learners touch supercooled water drops with an ice crystal and trigger the water drops to freeze instantly.

In this outdoor water activity, learners explore evaporation by painting with water and tracing puddles. Learners will discover that wet things become dry as the water evaporates.

In this chemistry activity (page 1 of the PDF), learners will observe a physical change.

In this activity, learners discover that sand is the major ingredient in glass.