A thin-walled plastic bottle is sealed at an altitude of 19 ,000 feet. What would happen to this bottle if it is carried down to 1,000 feet? It will shrink and collapse. It will expand and burst. It will expand but will not burst. It will shrink but maintain its shape.

It will shrink and collapse.<br /><br />When the bottle is sealed at a high altitude of 19,000 feet, the air pressure inside the bottle is lower than the air pressure at a lower altitude of 1,000 feet. As the bottle is brought down to 1,000 feet, the external air pressure increases significantly compared to the internal pressure, causing the bottle to shrink and collapse due to the pressure difference.