Which produces precipiation: a rising mosit air mass, a descending moist air mass, or both?

Question

Which produces precipiation: a rising mosit air mass, a descending moist air mass, or both?

Answer 1

A rising, moist, air mass cools.  As the air mass cools, it contracts which results in less space for water vapor to occupy.  There is a point at which all spaces are occupied with water vapor.  As the air rises higher, cools more and contracts more, precipitation occurs since there is no space left for that water vapor.

An easy but unscientific way to think of this process is that the water vapor is squeezed out of the air.

Answer 2

A rising moist air mass--that will lead to condensation and cloud formation.  A descending air mass causes drying.

Answer 3

it depends on the altitude it is ascendind or descending from.

if it is high, then both. if it is low then ascending.