But to chemists solutions are things that are still all mixed up. I am not sure how clouds get formed. But the clouds know how to do it, and that is the important thing. Some people can tell what time it is by looking at the sun. But I have never been able to make out the numbers.
Water vapor gets together in a cloud.
When it is big enough to be called a drop, it does. Clouds just keep circling the earth around and around. There is not much else to do. We say the cause of perfume disappearing is evaporation. Evaporation gets blamed for a lot of things people forget to put the top on.