Dec 18, 2019 • 1h 1m • 26 views

Humidity is the general term which describes the invisible amount of water vapour present in the air. It is a highly variable climatic factor which forms only a small proportion (varying from zero to four per cent and averaging around 2% in the atmosphere.) Humidity is measured by an instrument called hygrometer. Water vapour in the atmosphere comes through evaporation from the oceans, lakes, rivers, ice-­fields and glaciers, through transpiration from plants and respiration from animals. In this class, we have discussed about the humidity and its impact on the global weather system which is very useful for the competitive examinations like UPSC-prelims, State Services, NDA, CDS, etc.