When these drops are larger, what is it called?
It is called rain.
What causes rain?
Rain is caused by the sudden cooling of the air above the earth.
How does cooling the air cause rain?
The cold condenses the vapor in the air, so that its moisture is forced out in drops, which fall to the earth.
What becomes of the rain falling upon the earth?
A part of it remains on the surface of the earth, and is either absorbed again by the air, or is carried away to the ocean by the creeks and rivers.
What becomes of the remaining part?
It sinks into the earth, to furnish moisture to the roots of plants, and to supply the streams beneath the earth’s surface with water.