Question

when water is heated why do we see Bubbles rising up?​

Answer 1

Answer:

bubbles are actually oxygen molecules escaping

Explanation:

we know pressure is directly proportional to temperature. when we boil water, the pressure in turn with temperature inside the liquid rises. also air molecules tend to move from a region of higher pressure to a region of lower pressure. so the air molecules escape from the liquid to move to lower pressure, that is the air above. hope this helps you!

Answer 2

Answer:

because of heat that is given out