Water Cycle


 
 
Concept Explanation
 

Water Cycle

Water Cycle:

You know that three-fourth of the earth’s surface is covered by water. Most of the water is cycled between the oceans and the atmosphere through evaporation and rainfall.

  • Evaporation and transpiration :  Water from the surface of oceans, rivers, ponds and lakes into water vapour. Large amount odf water vapour enters in the atmosphere through transpiration by plants.
  • Formation of clouds by condensationAs water vapour rises condensation changes it to clouds. This occur due to the decrease in the temperature of air as we go high up. The air become so cold that the water vapour in it condenses to form tiny droplets.
  • Precipitation Heavy drops of water in the clouds fall as rains. However, if the temperature is very low, the water droplets freeze in the atmosphere and fall as hail or snow.
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    Sample Questions
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    Question : 1

    Evaporation involves ______________________

    Right Option : B
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    Question : 2

    Which of the following processes is not a part of water cycle?

    Right Option : C
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    Explanation
    Question : 3

    One of the following processe is not a step involved in water cycle in nature ?

    Right Option : D
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