Question

why the air bubbles in a medium move in upward direction​

Answer 1

Explanation:

If molecules have more room to move around, the object has a lower density. 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.

Answer 2

Answer:

because this balloon are filled with co2 u know co2 hot air and hot air always move upward direction