The Basics on Dry Ice Physical Description Dry ice is a condensed compound in the atmosphere known to man as carbon dioxide. Dry ice is used for many purposes. For example dry ice is used most to freeze, and keep things frozen because of its very cold temperature: -109.3F or -78.5C (-51.5K). Dry ice is widely used because it is simple to convert to its frozen form and easy to handle using …showed first 75 words of 573 total…

…showed last 75 words of 573 total…light through the side of the dish to observe vapor trails. Some natural vapor trails can be seen in time although you may have to put alcohol on the cardboard several times. Place an alpha ray source such as an old fashion illuminated watch dial or a Coleman lantern mantel inside to see more ion trails in the cloud chamber. Use a light source such as a bright flashlight to see the cloud tracks better.