WHAT MAKES SOME DRINKS FIZZY?
When opening a soda, seltzer water, or another fizzy drink, bubbles rise to the top and the drink makes a hissing noise. This happens thanks to a process called carbonation. A drink becomes carbonated when a carbon dioxide (what you exhale) is forced into it at high pressures during the bottling process. When you open the drink, the carbon dioxide bursts apart from the liquid due to the sudden lack of pressure — that’s what causes the hissing noise. The carbon dioxide particles then rise to the top and escape from your drink in the form of bubbles, making it fizzy!