water

 class 7

FILL IN THE BLANKS

(1 MARKS EACH)

1.A number of animals such as ………………. And …………….. need water as a habitat.

2.Water stored in ……………….. is used to generate electricity.

3.Water gets circulated between the earth and atmosphere by the ……………..

4.………………… March is celebrated as Water Day.

5.Water from lakes and rivers is ……………….. before it is supplied to our homes.

6.People obtain groundwater through ………… and …………….

7.Three forms of water are ……………., ……………… and ……………..

8.The water bearing layer of the earth is …………………..

9.The process of water seepage into the ground is called……………………

10.Plants …….. and ultimately………. If they are not watered for a few days.

VERY SHORT ANSWER TYPE QUESTIONS

(1 MARKS EACH)

1.Why does earth appear blue? Define water table.

2.When is water day celebrated?

3.Where is rainwater conserved?

4.Write some sources of ground water.

5.What is infiltration?

6.On which date world water day is celebrated.

7.What percentage of earth’s surface is covered with water.

8.By which natural process water on the earth has been maintained?

9.Name three forms of water.

10.Write the ways by which water vapour come to the atmosphere

SHORT ANSWER TYPE QUESTIONS

(2 MARKS EACH)

1.Where is rainwater conserved?

2.What are the two main reasons that have led to acute shortage of water all over the world?

3.You have been asked to maintain a garden. How will you minimize the use of water?

4.Write four things that you use water for?

5   5.  There are ten tube wells in a lane of fifty houses what could be the long term impact on the water table give reason to your answer.

6.What is water table and ground water?

7.What is drip irrigation?

8.How the water is being water at individual level?

9.What will be the effect on a plant if it is not watered for few days?

10.Can the river water be used for drinking purpose. Comment on this.

11.How is the growing industrial activity responsible for the depletion of water table?

12.Write the three main reasons that have resulted in the decrease of the water table.