Question

why the bubbles expand as they rise to the surface

Answer 1

Hey!!

Ur answer is :-
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The bubble gets bigger when it go up to the surface because there is less pressure as it rises to the surface.Air is less dense than water and thus the force of gravity is less on the bubble than on the surrounding water then the bubbles rise.

#riShu:-)

Answer 2

This is because is the bubble rises..... The pressure on the bubble decreases...... Thus letting the bubble to expand.....