Question

Why is it harder to breathe when climbing up a high mountain?
-The air pressure increases
-The air has more moisture
-The air is thinner
-The air compresses the lungs

Answer 1

It is harder to breathe when climbing up a high mountain primarily because **the air is thinner**. As altitude increases, the air pressure decreases, resulting in fewer oxygen molecules available in each breath, which can lead to difficulty in getting enough oxygen into the body. This phenomenon is known as altitude sickness, and it occurs because the body has to work harder to obtain the oxygen it needs in thinner air.