What happens to air pressure and the amount of oxygen as the altitude increases in earths atmosphere?
As altitude increases in Earth's atmosphere, air pressure decreases because there are fewer air molecules present in the higher levels of the atmosphere. This means that the air becomes less dense and the pressure exerted by the air decreases.
The amount of oxygen also decreases as altitude increases because oxygen molecules are also less concentrated in the higher levels of the atmosphere. This means that there is less oxygen available for breathing at higher altitudes, which can make it more difficult for people to breathe and can lead to altitude sickness in extreme cases.