Question

we go on high altitude pressure keeps on decreasing . give reason​

Answer 1

As air rises, the pressure decreases. It is this lower pressure at higher altitudes that causes the temperature to be colder on top of a mountain than at sea level.

Answer 2

Explanation:

The pressure decreases with increasing altitude because both the height of the overlying air column and the density of the air decrease. ... For this reason, warm air masses have a lower pressure than cold air, therefore the first tend to rise, the second to go down.