Page 73 - Science class 4

± The amount of water vapour in the air is
called humidity . Water vapour rises up and

condenses on the dust particles present in
the air into tiny droplets of water.

As more and more water vapours are formed,

they combine together to form clouds. These
tiny droplets of water then combine together

to form bigger droplets of water. Rotation

When these clouds reach a point of saturation, they are not able to hold water
droplets any longer and they fall down as rain. In very cold areas, they fall as

snow.

Quenching The Scientific Thirst
Quenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific Thirst
Quenching The Scientific Thirst
Quenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific ThirstQuenching The Scientific Thirst
Air acts as a protective blanket around the Earth. This blanket is

called atmosphere.

Rain Snow Fall
Scientific Terms

Droplet : a small drop
Globe : a model of the Earth with a stand
Interchangeable : which can be easily replaced with each other

Precious : valuable
Saturation : a stage at which nothing more can be added to a thing

Season : one of the periods of different weather
State : condition
Storm : a strong blowing wind