Water - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Points To Remember:
Water is precious natural resource, we use water for a number of activities .
People living in different parts of our country gets different amount of water. There are some region where people do not get adequate amount of water.
Water is also needed in industries for producing almost all things that we use like paper, fabrics etc.
We get water from sources like ponds, lakes, river and well.
About two thirds of earth is covered with water, most of this water is in ocean and seas. The water in ocean and seas has many salt dissolved in it.
Water changes into water vapour on heating.
The process of condensation plays an important role in bringing water back to the surface of earth.
The water vapour in air condenses to form tiny droplets of water, which appear as clouds. Many tiny water droplets come together and fall down as rain, snow or hail.
The circulation of water between ocean and land is called water cycle.
Excessive rains may cause floods while lack of rain for long periods may cause droughts.
The amount of useable water on earth is limited, so we should make wise and judicious use of water.
