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= States of Matter - Solids, Liquids and Gases (Annette Goodwin) =

Dry ice does not follow the above series of steps. Dry ice is **frozen carbon dioxide **. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice has the feature of **sublimation, **which means that as it breaks down, it turns directly into carbon dioxide gas rather than a liquid. The super-cold temperature and the sublimation feature make dry ice great for refrigeration. For example, if you want to send something frozen across the country, you can pack it in dry ice. It will be frozen when it reaches its destination, and there will be no messy liquid left over like you would have with normal ice. (see HowStuffWorks)

To view the three states of matter go to Chemistry Tutor Vista and click on an image to listen to an explanation of each state of matter.