On June 28th, Cool Science did a show for the Colorado National Guard Child & Youth Program! This time around Cool Science demonstrated to the group of pre-teens some of the amazing properties of liquid nitrogen. When nitrogen is cooled to a temperature of -322 °F it becomes a liquid with bizarre properties.
One example is how liquid nitrogen instantly boils when it touches human skin because of the temperature difference. It’s about 100 degrees difference between the liquid and the average air temperature outside! The small pocket of evaporated gas created by the boiling process creates a little hover board for the remaining liquid nitrogen, and droplets roll off the skin without causing any damage. After the show the kids got to make ice cream and Dippin’ Dots with the super cool nitrogen.
It was clear from the day’s activities that many of the kids were fascinated by the science behind the simple physical process of evaporation and condensation, and best of all they got to learn about the science in fun and interesting ways. Who doesn’t enjoy some delicious ice cream!