make notes formation of cyclon class 7
Answers
Answer:Cyclones
A Cyclone is a large scale air mass that rotates around strong centers of low pressure.
Water vapors are formed when water is heated.
This heat is released to atmosphere when water vapors convert to water during rains.
The heat released, warms the air around and makes it to move up. This also results in decreased air pressure.
Hence, cooler air from surrounding rushes to take the warm air’s place.
This repeats till a low pressure system with surrounding high speed winds is created. This is called a Cyclone.
Cyclone depends on wind speed, direction, temperature and humidity.
Cyclones are also called Hurricane in USA and Typhoon in Japan and Philippines
Structure of Cyclone The structure of cyclone contains:
Eye – Low pressure and area of sinking air. Its diameter ranges from 10-100 kms.
Eye Wall – Dense cloud surrounding eye having maximum wind speed. It causes maximum destruction.
Spiral rain bands – Band of clouds spiraling into eye wall and it contains heavy rains