Why does a helium balloon expand as it goes up?

The pressure inside the balloon increases.

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The pressure inside the balloon decreases.

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The atmospheric pressure decreases.

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The atmospheric pressure increases.

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Solution

The correct option is C The atmospheric pressure decreases.
Atmospheric pressure is inversely proportional to Altitude. So, as the altitude of the balloon increases, the atmospheric pressure outside the balloon decreases, resulting in its expansion.

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Why does a helium balloon expand as it goes up?

The correct option is C The atmospheric pressure decreases.Atmospheric pressure is inversely proportional to Altitude. So, as the altitude of the balloon increases, the atmospheric pressure outside the balloon decreases, resulting in its expansion.

The correct option is C The atmospheric pressure decreases.
Atmospheric pressure is inversely proportional to Altitude. So, as the altitude of the balloon increases, the atmospheric pressure outside the balloon decreases, resulting in its expansion.