 Colder Than Ice (recommended for K-6) - This presentation focuses on the properties of dry ice and liquid nitrogen, and uses them to make clouds and discuss the water cycle. Dry ice and liquid nitrogen are both sub-zero materials which amaze students of all ages. Audiences learn about phase changes, the effects of extreme cold on objects, and explore some of the similarities and differences between carbon dioxide, nitrogen, and water. The importance of the water cycle is also reviewed as the MOST educator leads the audience in a call and response song.
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