Gas bubbler

A gas bubbler is like a toy that blows little bubbles in your bath tub, but it's used for science stuff. Scientists use it to add gas (like air or carbon dioxide) to a liquid (like water) in a really controlled way. They do this by putting a tube into the liquid and blowing gas into it, so the gas bubbles come up through the liquid. The bubbles help mix the gas and liquid together really well, and they also make sure the gas gets added slowly and steadily. It's a simple but effective tool that is used in many different scientific experiments and processes.