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Learners will compare the growth rate and appearance of crystals forming on small rocks to those growing on miscellaneous objects. Learners will also investigate how temperature (warm vs.

In this activity, learners explore sublimation by conducting experiments with dry ice.

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

In this activity, learners sublimate dry ice and then taste the carbon dioxide gas.

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

In this activity, learners explore Boyle's Law and discover that water will boil at room temperature if its pressure is lowered.

"Sublimation Bubbles" allows learners to explore how some solid materials, such as dry ice, can phase change directly from their solid to gaseous form.

In this activity, learners thread colored beads onto string. Each beach represent a process of the water cycle.