When dry ice appears to give off smoke it is solid carbon dioxide subliming to vapor. The "smoke" is thus carbon dioxide gas.
Dry ice is also often used in the theatre/television/movies etc. because it is cold enough to condense water vapour in the air to produce fog that may resemble smoke. Please see the link.
Dry ice is made of carbon dioxide. Chemical formula for it is CO2. It is a compound.
compound
The dry falls were formed by glacial activity
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Dry ice is not an element. Dry ice is solid carbon dioxide, CO2, which is a compound.
To change the color of dry ice smoke, you can mix it with other substances that will react and produce different colored smoke. For example, adding food coloring to hot water before dropping in dry ice can create colored smoke. Be cautious when handling dry ice and follow safety precautions.
because of the carbon dioxide in the dry ice because of the carbon dioxide in the dry ice because of the carbon dioxide in the dry ice