2Cloud FormationClouds result from the condensation of water vapor in the atmosphereSuspended particles of ice, slat, dust, etc, provide the surfaces necessary for the cloud-forming condensation. These particles are called condensation nuclei.
3Adiabatic Temperature Changes Are changes in temperature that result from the expansion or compression of airFor dry air, temperature of dry air decreases about 1°C for every 100 mFor moist air it varies from 0.5°C to 0.7°C per 100m
4Condensation LevelWhen the air reaches a level where its temperature is lower than its dew point, the moisture in the air condenses to form a cloud
5Forceful LiftingAir can be forced up quickly when it encounters a mountain rangeDuring storms, warm air is pushed above denser cooler air
6Classification of Clouds Clouds are classified by their form and altitudeLow clouds – up to 2000 mmiddle clouds mhigh clouds – above 6000 m
7Stratus cloudsSheetlike, layered clouds. These are the most extensive clouds in the sky.Little rain usually falls from these kinds of cloudsVarieties: nimbostratus, altostruatus