A factory at a low elevation ships bags of popcorn to cities at high elevations. Why does the factory manager need to monitor the amount of air in each bag?

At low elevation, the air pressure outside the bag is relatively high. As the bag travels to a high-elevation city, the outside pressure decreases, so the air inside expands and pushes outward on the bag. If the bag contains too many air molecules, that expansion can make it pop. Therefore, the correct choice is “Too many molecules can cause the bag to pop as it moves from a high pressure to a low pressure.”

AI-written and checked against the verified answer.