Question

Air or gas bubbles rise up through any liquid instead of falling ?why?

Answer 1

A bubble and the air trapped inside of it are both very light. In order to float, the bubble hitches a ride on a gas that is slightly denser than the air trapped inside of it: carbon dioxide!Because the air trapped inside a bubble is less dense than the air outside the bubble, it's up, up and away! The heavier carbon dioxide in the air around the bubble pushes up on the air trapped inside the bubble and off it goes.