Multiple choice

While scuba diving, a girl notices air bubbles underwater. She observes that the size of a bubble is small when it is deep underwater. But the size increases as it moves upwards. What could be the reason behind the increase in size of the bubble?

  1. It is due to gravity.

  2. Water enters into the bubbles to make them appear larger.

  3. It is due to decrease in pressure applied by water on air bubbles.

  4. Friction

  5. More air enters into the bubbles from top.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There is decrease in pressure applied by water column on air bubbles as they rise up.

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