TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE PHOTO LIBRARY
Dry ice sublimating. Several pieces of white dry ice are placed in a watch glass in a ring stand. Dry ice is solid carbon dioxide (CO2). Under normal conditions, it sublimes, i.e. turns to gas directly from solid state. White smoke is a fog or mist of water droplets condensed from the air.
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