Question

(a) Is the amount of oxygen present at the ground level and high altitudes the same?

(b) Based on your answer in (a), what happens to the relative amount of oxygen at higher altitudes?

Answer 1

(a) No, the amount of oxygen present at the ground level and high altitudes is not the same.

(b) The amount of oxygen present at the ground level is around 21%. As we move up in the atmosphere, the air gets rarer and hence, the oxygen level is lower at higher altitudes.