Pressure drops as you go up.
This is a 170% increase in elevation.
At high elevation the pressure is lower and the boiling point depends on this pressure.
The actual atmosphere itself does not change with elevation, but the atmospheric pressure does.
change in elevation and change in density
you cannot increase the pressure from a gravity tank by changing the pipe size, only the volume of water that will flow in a given period of time. The only way to increase the pressure is to increase the difference between the elevation of the tank and the elevation of the spigot. Many people will confuse an increase in water volume with an increase in water pressure, because, in both cases, more water will flow in a given period of time. ...moreincreasing the pipe size can reduce elevation loss due to friction which can translate in lay mans terms as an "increase in pressure"
the air pressure changes based on elevation
Change in volume - container getting bigger or smaller with same amount of air; Change in temperature - air gets hotter or colder causing it to expand or contract; Change in density - air is pumped into or out of a fixed container.
The volume will increase in proportion to the increase in absolute temperature.
Your elevation above sea level or the weather passing over you.
If you increase the volume of the container, and not the gas itself, then the pressure decreases. If you increase the volume of the gas, and not the container, then the pressure increases.
because the clouds create a mist that is full of H, which can touch the earths atmosphere. it creates pressure in our ears because the ear wax chemically reacts to the H
At a greater depth, the weight of all the liquid (or gas) above adds to the pressure.