Dry Ice

What is dry ice?
 - The frozen form of carbon dioxide
How is it made?
STEPS:
1. Take the gas form of carbon dioxide and have it pressurized and refrigerated to form liquid carbon dioxide.  
2. Allow for it to expand in an atmospheric chamber.
3. When the CO2 changes from a liquid to a gas, there should be a huge drop in temperature, which will cause some of the gas to freeze. This should allow for the creation of both the solid and gas form of carbon dioxide. 

4.  Product is then hydraulically pressed into dry ice blocks.   

What is it used for?
- Is particularly used for freezing/keeping things frozen
- Also to create "fog"
Why does it "smoke"/Is it really "smoke"?

- When combined with water, it turns into a cold mixture of carbon dioxide and humid air, which creates condensation of water vapor in the air (smoke/fog).