Water and Its Importance Notes

• A cloud is composed of millions of little droplets of water (or ice crsytals when temperature is very low) suspended in the air.
• Hence a cloud can form, when water vapour becomes liquid, i.e. when the humid air is cooled and condenses on tiny particles.
• There are several steps of cloud formation.

Water vapour present in air

Warm air along with water vapour rises in the atmosphere

• Water cycle is the cyclic movement of water from the atmosphere to the Earth and back to the atmosphere through various processes.
• There are six important processes that make up the water cycle.

Condensation:

• Water vapour present in the atmosphere changes into water.

Infiltration:

• Infiltration is an important process where rain water soaks into the ground, through the soil and underlying rock layers.

Runoff:

 Drought: