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Gravity - or, more precisely lack of it ! The further away from the centre of the earth you are - the less gravity affects apply. Standard air pressure at sea-level is approximately 14 PSI - but that reduces exponentially with altitude.

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Q: Why does air pressure reduce at top of mountain?
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Related questions

Why does the top of a mountain have greater air pressure?

It doesn't. Pressure is lower at the top of a mountain because there is less air weighing down on top of it.


What should a person expect to happen to the air pressure as they move from the base of a mountain to the top of the mountain?

As you move from the bottom to the top of the mountain, the air pressure decreases.


Where is air pressure strongest?

On top of a mountain


Why would the top of a mountain have a low air pressure?

The higher you are in the atmosphere, the lower the air pressure. Seeing that the top of a mountain is quite high, the air pressure is low; the air is thinner. This is why you need oxygen tanks to reach the top of Mount Everest


Is air pressure the greatest at the top of a mountain?

no, at bottom


What happens to air pressure as you move from the base of a mountain to the top of a mountain?

is decreases


What is the air pressure at the top of the mountain compared to the bottom of the mountain?

The air at the top of the mountain is going to be much less dense than the air at the bottom of the mountain because it is affected less by gravity.


What layer on the mountain would have the most air pressure?

The top.


Why is there less air pressure on top of a mountain?

cuz it wants to!


How is air pressure different from the top of the mountain vs the bottom of a mountain?

well a moutian if it is tall enough can reach the sky and air pressure their is 0


Air pressure decreases as?

Air pressure decreases as height is gained. There is less air pressure at the top of a high mountain, than at sea level.


Why is air masses greater on top of mountain?

because the air pressure is more dense