109 Degrees Below Zero

109.3° below zero F is colder than the lowest temperature ever recorded in the United States, but that's how cold the dry ice in this exhibit is!

Small pieces of dry ice drop into water and spin in a cloud of gas. Watch dry ice change from a solid into a gas as it skates around on the surface of the water. The pieces spin because the dry ice is changing unevenly. The water warms the ice more quickly than the air does.