At high altitude the air is thinner because of the gravitational pull of the Earth that draws air molecules towards its centre. This making the air denser near the surface and thinner as altitude increases. The less dense the air is, the less oxygen the air contains.
The air is thinner
yes, as you go farther up from the sea level, the air will become thinner.
The closer you are to the edge of the atmosphere, the denser air gets. That's why mountain climbers find it difficult to breathe, as there is less oxygen in the air up there.
It decreases because as you move up in altitude the air becomes thinner making it colder.
Because the air is thinner up there. There is less oxygen in the air, so it is harder to breathe.
Thinner air at higher elevations, is colder.
It's extremely hard to breath, because the air is thinner the higher you go up until, your space where there is no air.
The air gets thinner. That's why if you are climbing a mountain the trees are shorter as you get to the top because they don't have as much air as the lower atmosphere.
From what I recall, the air at the bottom of a mountain is usually warmer, wetter, and more oxygenated. The air at the top gets less of these three depending on as high up as you go.
Wind is blowing air up over the mountain. Going from about 1,000 feet at the base to 7,000 feet at the top, the temperature changes as the air goes over the mountain.
A 1inch by 1inch column of air from the edge of the atmosphere to sea level weighs 14.7 pounds, 80% of that is in the Troposphere. As you go up, the air within that column has less mass, making the air "thinner", and air pressure goes decreases.