Dry Ice
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Dry Ice:
Imagine trying to keep your drink cold at a picnic without access to a refrigerator; you might use ice cubes that eventually melt and turn into water. Similarly, dry ice, which is the solid form of carbon dioxide, sublimates, or turns directly from a solid into a gas, without becoming a liquid first. Just as ice cubes cool your drink through melting, dry ice cools its surroundings by sublimating, but instead of leaving a puddle, it disappears into the air, like a magician's disappearing act.
Practice Version
Dry Ice: The solid form of carbon dioxide. Dry ice. Dry ice is the frozen form of carbon dioxide and is used to keep things cold without leaving any liquid residue.