With Best Regards: Closing Your Letter. June 17, 2014 by. When writing professional or informal emails and letters, it is often considered proper etiquette to complete your correspondence with an appropriate closing signature.
What two conditions are needed for clouds to form? Air must be cooled to its dew point and particles must be present in the air When are clouds formed by ice crystals instead of drops of liquid water?
As well, clouds are identified by the way in which they form. There are two basic types: cumulus and stratus. Cumulus clouds form in rising air currents and are evidence of unstable air conditions. Stratus clouds form in horizontal layers and usually form as a layer of moist air is cooled below its saturation point.