1. What does the balloon do as water rises in the small bottle? 2. Does the small bottle completely fill with water? 3. In step number 5, which part of the process involves negative feedback mechanism? Briefly explain your answer
The air inside the bottle compresses a little bit but not enough to permit the balloon to inflate. ... The air in the balloon pushes out against the walls, keeping it inflated. When the hole is unplugged, air flows back into the bottle. The air pressure in the bottle increases and collapses the balloon.
It is due to anomalous expansion or strange behavior of water.
The expansion of water takes place as it is cooled from 4 degrees Celsius to zero degree Celsius. This behavior is unusual because most substances contract when they are cooled. But water expand on solidifying. Due to this expansion a glass bottle completely filled with water and tightly closed at room temperature is likely to burst when it is kept in fridge.
