Why is rain made out of water?

Answer 1

A real answer: Rain is water because rain is made of what evaporates into the air.

Once it evaporates the stuff that isn't water does not condense into water. SO thing like gasoline change into CO2

When the waqter condenses it form clouds When the clouds get large and dense enough it rains

A2. Water evaporates from the surface of the liquid, and this evaporated bit is called water vapour.

This is a gas, and is invisible, and is able to rise in the air, for H2O as a molecule, weighs less than O2 or N2, the other main components of the air. Since it is a gas, diffusion also helps.

As the air becomes less dense with altitude, the water vapour is even more easily able to expand and rise.

Eventually, however, the air at higher altitudes becomes cold, and this will result in the water vapour condensing out as water molecules - just tiny droplets at first, quite like a fog. This we see in the sky, and know as a cloud.

If the temperature drops more, then more and more of the water vapour will condense into droplets, and these will soon bump into each other and form bigger droplets. Eventually these droplets will no longer be buoyant in the air, and will fall as rain. If there is turbulence in the cloud, this will also increase the rate of droplets joining.

Thus these droplets will fall down due to the force of gravity. And we feel it as rain.

If the rain drops become too big (greater than c10mm) then the droplet will fall faster, and the wind of their passage will tear them apart. Raindrops much larger than 10mm are very rare.