In this slide i have illustrated the cloud formation process. Visit www.naipathya.in

1. Clouds are formed due to the evaporation-condensation cycle that takes place
on daily basis in the earths atmosphere.
Clouds on Earth are mainly made up of water (H2O) but in some cases have
higher acid content due to the pollution from factories vehicals etc which
makes them corrosive and thus when these clouds rain we get what is called as
acid rain.
On many planets like Venus the clouds are made of nitric acid and
carbondioxide which always stays as clounds and never rains as the
temerpature for their condensation is pretty low and thus this layer of
permanent could envelopes the planet at all times.
Origin of Clouds
The evaporation cycle is the first step in the formation of clouds. In this step
water from all the waterbodies get heated up due to the heat radiations from
the sun and eventually evaporation begins.During evaporation unlike boiling
where changing of water into water vapour begins at the bottop of the
container and spreads in the entire volume evaporation is a surface
phenomenon and thus takes place only at the surface of the water bodies.
The water vapour formed reaches upper layers of the atmosphere and as it
reaches the air which holds the watervapour becomes cooler and cooler untill
finally it cant hold any more watervapour (air is saturated) and at this point
small droplets form and condense on dust particles or acid partilces suspended
in air. The size of this droplet is so small that it reamains suspended in air as
clouds and collides with other water droplets.
Upon collision the water droplets combine to form bigger droplets untill
finall they become huge enough to no longer be suspended in air and fall on
the surface of the Earth as rain.Many of these droplets also stay suspended as
ice nuclie in the air and can also cause hailstorms or snowfall to occur.