Talc is found on rocks and on babies. When they broke open molecules, they found they were only stuffed with atoms. But when they broke open atoms, they found them stuffed with explosions. Some oxygen molecules help fires burn while others help make water, so sometimes it's brother against brother. In looking at a drop of water under a microscope, we find there are twice as many H's as O's.
Clouds are high flying fogs.
I am not sure how clouds get formed. But the clouds know how to do it, and that is the important thing. Clouds just keep circling the earth around and around and around. There is not much else to do. Water vapor gets together in a cloud.