What is the relationship between evaporation precipitation and saturated air?

Answer 1

When you give energy to water in the form of Heat, all water molecules does not receive equal energy. Some water molecules have more energy than average energy of water molecules in a container, they will escape in to air in the form of Evaporation.

When you closed the container with a plate, the evaporated molecules condensed in to water droplets after hitting no of walls in container (no chance for escape) and enter in to container again.

After some time some molecules are evaporating and some molecules are condensing, at a certain stage the number of molecules that get evaporated becomes equal to the number of molecules that are condensing.

This is the point of Saturation. Air also takes some finite amount of humidity in to it, it depends on ambient air temperature.

Answer 2

The length of time it takes air to become saturated when precipitation falls. Light precipitation can completely evaporate into dry air as it falls to produce a large vapor pressure gradient between the drop and the surrounding dry air.