As the bottle is carried from 14,000 feet to 9,000 feet to 1,000 feet, it becomes compressed. What would happen if you took a normal-shaped bottle, sealed it at 1,000 feet, and then carried it up to 14,000 feet?

At 1,000 feet, the sealed bottle contains air at a relatively high pressure. As it rises to 14,000 feet, the air pressure outside the bottle decreases, while the pressure inside remains higher. That pressure difference pushes the bottle outward, so it would expand and could eventually burst. The correct choice is “The bottle would expand and may eventually burst.”

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