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Blue Planet

 



Hydrosphere is derived from the word " Hydro" which means "water".

It refers to the water on the Earth.

The Earth is called Blue Planet because 71% of its surface is covered with water and only 29% with land.

Water is found as solid  ice in glaciers and ice sheets.

Water is found as liquid water in  Oceans, rivers , lakes , ponds and underground streams.

Water is found as Vapour in the Atmosphere.



Water moves continuously from one form to the other and this movement is called Water cycle.

  • Water is essential for maintaining a water balance.
  • It is important for survival of human beings.
  • Needed for domestic and industrial usage.

we should prevent  water from pollution and wastage.

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