Answer: According to my search, Clouds move because the wind is carrying the parcel of cloudy air along. ... The droplets in the cloud are moving fast with the wind, but new cloud drops are always forming in the same place where the air is pushed up near the hill, so the front of the cloud appears stationary. According to my search for the second question, The same air that flows along the foothills flows over the peaks, and yet it only forms clouds over the peaks. So clouds roughly hold their shape (for a little while) because it takes time for the humidity or temperature to change, or for the cloud to be twisted up by local air currents.
Since clouds are made up of millions of tiny pieces of water, when they are really high up in the sky where the air is very cold, the water droplets freeze into floating ice crystals. When we observe these clouds way up in the sky, they look like wispy strands.
All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. (sorry if that’s not helpful.)
