Q. 6 C5.0( 2 Votes )

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Answer :

Clouds are a type of aerosols consisting of minute liquid droplets frozen crystals or other particles suspended in the atmosphere of a planetary body. A visible mass of condensed water vapour floating in the air above the ground level is called a cloud.



The picture above shows the classification of clouds.


On the basis of height, clouds are classified into the following types:


High clouds - The clouds present at the height of 6 to 20 kilometres. There are three types of high clouds:


1. Cirrus- These are present at the height of 8,000 to 12,000 meters in the form of white delicate fibrous silky filaments formed at the high sky.


2. Cirro-cumulus- these are composed of ice crystals and appear white patched, sheet or layer like.


3. Cirro stratus – These are also composed of tiny ice crystals and are smooth, milky and transparent.


Middle clouds – These clouds are present at the height of 2.5 to 6 kilometers. The following are the types of middle clouds


1. Alto-stratus- These clouds consist of frozen water droplets and appear in a uniform manner. The colour of such clouds is bluish and grey.


2. Alto-cumulus- These are also called sheep clouds or wool pack clouds. They have a wave appearance in the sky and exist parallel.


3. Nimbo stratus- These clouds are associated with rain, sleet, and snow. These are dark, grey, featureless layers of clouds, thick enough to black out the sun.


Low clouds- These clouds exist from the ground level up to 25 kilometers above. There are four types of clouds in this boundary:


1. Strato cumulus- These clouds are associated with clear or fair weather and are found at the height of 2500 to 3000 meters. These are grey or whitish in colour.


2. Stratus- These are low-lying dense clouds which are associated with rain or snow.


3. Cumulus- these clouds are also associated with fair weather and are domed shaped with a flat base and resembles a cauliflower.


4. Cumulo nimbus- These clouds are capable of producing heavy rains, hailstorms, tornadoes, and snow. These are thunderstorm clouds which fluffy and thick.


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