Air pressure decreases as altitude increases. Matter is held by gravity. The same reason that pressure is greatest in the core, the least pressure is farthest from the core. Matter "thins - out". The heaviest elements are always in the center and the lightest are furthest from the center.
The layer of the atmosphere with the least amount of air pressure is the exosphere, which is the outermost layer of Earth's atmosphere. It is composed of very thin air molecules spread far apart, resulting in extremely low air pressure.
Air pressure decreases as altitude increases. Matter is held by gravity. The same reason that pressure is greatest in the core, the least pressure is farthest from the core. Matter "thins - out". The heaviest elements are always in the center and the lightest are furthest from the center.
Air pressure is typically the least at high altitudes, such as at the peak of a mountain or in the upper atmosphere. This is because there is less air above exerting pressure downwards.
exosphere Which is the uppermost layer of the atmosphere.
The Exosphere.
the exosphere
troposphere
The Exosphere.
Troposphere.
The crust
The exosphere is the least dense part of the earth's atmosphere.
I'm pretty sure it's at least 1000km