It differs from fog in that it does not reach the surface of Earth.
Clouds are a direct expression of the physical processes taking place in the atmosphere.
An accurate description of both type and amount plays an important part in the analysis of the weather and in forecasting the changes that take place in the weather. To be able to thoroughly understand clouds, the Aerographer s Mate must know the physical processes that form clouds. Three conditions must be met before clouds can form as a result of condensation presence of sufficient moisture, hydroscopic or sublimation nuclei in the atmosphere, and a cool-ing process. The first task is to consider the hydroscopic and sublimation nuclei. Hydroscopic nuclei are particles of any nature on which condensation of atmospheric moisture occurs.