what happens to air pressure and the amount of oxygyn as the altitude increases in earths atmosphere ?
As altitude increases in Earth's atmosphere, air pressure decreases. This is because there are fewer air molecules at higher altitudes, resulting in lower atmospheric pressure.
The amount of oxygen also decreases as altitude increases. This is because the air at higher altitudes is thinner, meaning there are fewer oxygen molecules available for breathing. This can result in lower oxygen levels in the blood, which can cause altitude sickness or even hypoxia if not acclimatized properly.