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NCERT Solutions for Class 7th Science


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Chapter 16. Water : A Precious Resource

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Chapter Review:

  • Water is essential for all living beings. There can be no life without it.
  • The world water day celebrating every year 22 March.
  • About 71% of the earth’s surface is covered with water.
  • Water exists in three forms: solid, liquid and vapour.
  • The groundwater is stored between layers of hard rock below the water table. This is known as an aquifer.
  • The rainwater can be used to recharge the groundwater. This is
    referred to as water harvesting or rainwater harvesting.
  • A level where all the space between particles of soil and gaps between rocks are filled with water.The upper limit of this layer is called the water table.
  • The solid form, snow and ice, is present as ice caps at the poles of the earth.
  • Liquid water is present in oceans, lakes, rivers, and even underground.
  • The gaseous form is the water vapour present in the air around us.


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