Question

what is water cycle of 9th class

Answer 1

The water cycle, also known as the hydrologic cycle, is the continuous movement of water from the earth’s surface to the atmosphere and then back to the ground. It is a continuous process. Hence, it does not have a starting or an ending point. Thus, the water present on earth has been in circulation since the evolution of the earth. Water goes through all the three states, solid-liquid-gas, in the process. There are several factors that assist the water cycle, the sun, air currents to name a few.

Answer 2

The whole process in which water evaporates and falls on the land as rain and water flows back into the sea via rivers is known as the water-cycle.

Main steps involved in water cyles are:

a. Evaporation: Water on earth changes to vapour due to sun’s heat and rises above.

b. Transpiration: Plants absorb water through the roots and then give off excess water in the form of vapor through pores in their leaves.

c. Respiration: It is a process in living organisms involving the production of energy, with the intake of oxygen and the release of carbon dioxide along with water vapour.

d. Precipitation: It is the process of condensation of water vapour in atmosphere into liduid which fall down in the form of rain, snow, sleet or hail.

e. Percolation and Absorption: Some of the precipitation soaks into the ground to reach the underground water, some on land gets absorbed by the plants, crops and trees to grow and the rest flows downhill as runoff to reach the seas to complete the whole water cycle.