Class-4 EVS, Chapter-13, A River's Tale, Additional Exercises with Solutions / NCERT


Chapter – 13
A River’s Tale

Match the column:

A
B
People use river water for
is seen during rainy season
Filtering, boiling, UV treatment are methods for
dissolve in water.
Sugar, salt, lemon juice, sherbet
washing clothes, bathing animals and cleaning utensils
Muddy water in reservoirs
cleaning water

Ans
A
B
People use river water for
washing clothes, bathing animals and cleaning utensils
Filtering, boiling, UV treatment are methods for
cleaning water
Sugar, salt, lemon juice, sherbet
dissolve in water.
Muddy water in reservoirs
is seen during rainy season

Click here for Hindi (रिमझिम) Class-4

Fill in the blanks:

     1-  Water in the river keeps changing as it flows through various places.
     2-  Flow of stream is different at different times of a year.
     3-  Water from the sea is not drinkable.
     4-  Industrial effluents pollute the river water.
                                                                                            (Click here for Class-4 English, Marigold) 
Answer the following questions:

Q. What could the reason for decrease in number of fishes in river?
Ans- The reason for decrease in number of fishes in river is pollution.

Q. What could be done to keep rivers clean? Discuss.
Ans- Following things can be done to keep rivers clean:
     1-  Stop washing/ bathing activities
     2-  Treating the municipal waste
     3-  Treating industrial effluents

Q. If you want to drink some water, from which part of the river would you like to drink? Why?
Ans- I would like to drink the water of the river from the mountain region as it is the cleanest water.

Q. Will there be same amount of water in the ponds or rivers during the rainy season and in summer?
Ans- No, the amount of water in the ponds or rivers will be more in rainy season compared to summer.

Q. Find out the many different ways of cleaning water at home.
Ans-  Following are different ways of cleaning water at home:
      1-  Boiling
      2-  Using Filters
      3-  Using Purification drops. Tablets
      4-  Solar treatment
      5-  UV treatment
      6-  Using Bleach/ alum

Draw pictures of various ways of cleaning the water.





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