The next question

Q: How is water carbonated?
A: Carbonated water is water in which carbon dioxide gas has been dissolved. To make carbonated water, you need dry ice and cold water. Add one piece of dry ice to the glass using tongs, then another. Be very careful when doing this. Dry ice hurts if you touch it. When the first two pieces are gone, add another two. When those melt, you have carbonated water!

                                                      The dry ice will look like this.