2 Cloud 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.
3 Adiabatic 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
4 Condensation 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
5 Forceful LiftingAir can be forced up quickly when it encounters a mountain rangeDuring storms, warm air is pushed above denser cooler air
6 Classification of Clouds Clouds are classified by their form and altitudeLow clouds – up to 2000 mmiddle clouds mhigh clouds – above 6000 m
7 Stratus cloudsSheetlike, layered clouds. These are the most extensive clouds in the sky.Little rain usually falls from these kinds of cloudsVarieties: nimbostratus, altostruatus