Question

A hiker seals a plastic bag that contains dried fruits before he climbs a mountain. What will most likely happen to the plastic bag as the hiker reaches the top of the mountain?
The bag will expand.
The bag will shrink.
The bag will remain the same size.
The bag will allow air to enter.

Answer 1

The bag will expand.

Explanation: As altitude increases atmospheric pressure falls. The sealed air inside is at a higher pressure than the outside, so it expands (Boyle’s law), inflating the bag.