Sometimes I get to play in the lab as well. The young chemists know how to have fun. Recently we were creating smoke; it looked just as if we were making a magical concoction of some sort.
Please watch the video clip and try to guess what we are doing; or read the explanation below the clip;)
It is dry ice that has been dumped into the sink and mixed with water to create smoke. Dry ice is frozen Carbon Dioxide, or CO2, which is a gas under normal conditions. When in the "dry ice" state, it becomes extremely cold and in the laboratory it is used to transport or to "snap freeze" samples. When it mixes with water, the extreme cold causes the water vapor to condense into clouds. This was in no way dangerous as the amount of dry ice was very small; only a harmless fun to end a long day at the lab.;)