What would cause a balloon to expand if taken to the top of a mountain?A.Lowered pressureB.Increased amount of moleculesC.Lowered temperatureD.Increased molecular collisionSUBMITarrow_backPREVIOUS
Question
What would cause a balloon to expand if taken to the top of a mountain?A.Lowered pressureB.Increased amount of moleculesC.Lowered temperatureD.Increased molecular collisionSUBMITarrow_backPREVIOUS
Solution
The answer is A. Lowered pressure.
Here's why:
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The pressure at the top of a mountain is lower than at sea level. This is because there is less air above you pushing down.
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A balloon expands when the gas inside it moves from an area of high pressure to an area of low pressure.
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When you take a balloon filled with air (which is under pressure) to the top of a mountain, the external pressure decreases.
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Because the pressure inside the balloon is now greater than the pressure outside the balloon, the gas inside the balloon will expand to equalize the pressure.
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This causes the balloon to expand.
So, the lowered pressure at the top of a mountain would cause a balloon to expand.
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