Meaning of cloud: When the temperature of the air blowing upwards in the atmosphere falls below the dew point, the water vapor present in the air cools down and it turns into micro-water particles or snowflakes. Such water – particles or snowflakes suspended in the form of agglomerates in the atmosphere are called clouds.
Types of clouds:
Clouds are divided into the following types depending on their altitude, size, density and transparency:
1. Cirrus clouds: These clouds are found at greatest height (8000 to 12000 meters). The climate and the sky remain usually clear due to these and there is no rainfall. They are spread across the entire sky, like a white sheet. On their arrival, haloes are formed around the sun and the moon, which is indicative of the arrival of cyclone.
2. Cumulus clouds: These are very extensive and dark – coloured and dense clouds. These clouds cause heavy rains, hail and thunderstorms. They look similar Jo cotton and their height ranges from 4000 to 7000 meters. Their shape is like cauliflower.
3. Stratus clouds: These clouds look like fog and are found nearest to the surface. They are composed of many similar layers. They are formed in the cold winter in the temperate zone due to the presence of two opposite – natured winds. Their colour is light brown and some times pink or purple. The sky is blurred due to their shade. The possibility of drizzling is there due to these.
4. Nimbus clouds: These clouds are thick and dark. As they are dense, darkness prevails and there is heavy rain. They are situated at the lowest height. From distance, it looks as if they are touching the earth. These clouds cause the maximum rainfall.
