Solution:
Definition:
Clouds are a form of condensation at higher elevations. Because of condensation, fine particles of ice and water float in the air at a greater height. They accumulate around dust particles in the air and become larger in size. Their accumulation together is called a cloud.
Types of Cloud:
High Clouds: These clouds are mainly made up of ice particles. They can be classified into cirrus, cirrocumulus and cirrostratus. Cirrus clouds are mainly wispy. Cirro-Cumulus clouds look like groups of small waves. Cirrostratus are like a bedsheet with wrinkles. They generally have a halo around them.
Medium Clouds: These include alto-cumulus and altostratus. Alto-cumulus are in the form of layers and have a wave-like structure. They are mostly white in colour and have a grey shade. Altostratus is not very thick. The sun can be seen through them as if seen through a milky glass.
Low Clouds: These consist of five types of clouds. Strato-cumulus have layers. Their colour is white to earthy. Round clusters of clouds can be here. Stratus clouds also have layers. They are ash coloured and their base is uniform. Nimbo-stratus has thick layers.