Last week RYNJ eighth grade students participated in a dry ice presentation on Dry Ice Day. RYNJ science teachers brought in a boxes of dry ice to demonstrate its properties to the students. Dry ice consists of solid Co2. First, students watched the dry ice subliming, which means melting straight from a solid form to a gas. Then, they dropped some of the dry ice into a vat of warm water and watched the sublimation process speed up. Later, they added soap to the water and observed the formation of gas bubbles. This is a result of the gas within the liquid vaporizing. The bubbles were far more breathtaking than regular bubbles. Instead of regular air inside, it had a thick gray gas in the middle of the bubble, as the gaseous mixture that we visualized was pure Co2 before mixing with the oxygen. Afterwards, students were able to touch (wearing gloves) the dry ice and slide it around. The gloves protected their hands from the extremely freezing temperature of dry ice which is -109.3 F. If dry ice is touched with bare hands it can cause frostbite. Dry Ice Day was very informative, educational and entertaining.

By Yaakov Malik, Class of 2019

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