Question 1:
What is the colour of the river where it begins ?
Answer:
It is transparent and colourless.
Question 2:
At some places, there are many fishes in the river at others there are only a few and at some places there are dead fishes. What could be the reason for this ?
Answer:
The fishes require fresh and pure water. Where there are many fishes in the river, the water is fresh and pure which enables them to survive. When people throw wastes from their houses and factories, the water of river becomes polluted and unfit for fishes to survive so that their number decreases at that place.
Question 3:
What can be seen in the river before it reaches the village ?
Answer:
Large number of fishes can be seen in the river before it reaches village where the water of river becomes polluted.
Question 4:
At which places did the colour of the water in the river change ? Why did this happen ? Discuss.
Answer:
In those places where the factories are situated near the river, the river water changes colour. It is because polluted water from factories is thrown into river.
Question 5:
Which of the places shown in the picture would you like to live in ? Why ?
Answer:
I would like to live at the places which are showing clean water in the picture.
Question 6:
Would you like to change any of the things that you see in the picture ? Why and how ?
Answer:
I would like to remove the waste material dumped on the bank of the river. And if not removed this material would contaminate river water.
Question 7:
Have you seen people throwing different things into rivers or water bodies ?
Answer:
Yes.
Question 8:
What could be done to keep rivers clean ? Discuss.
Answer:
Industrial wastes and sewage should not be thrown into the river water.
Question 9:
If you wanted to drink some water, from which part of the river would you like to drink ? Why ?
Answer:
I would like to drink water from little below the surface of water and from a place where there is no dumping of waste material.
Question 10:
In the last part of the picture the river flows into the sea. Have you ever seen the sea ? Where ? In a movie, or some where else ?
Answer:
I have actually seen sea in Chennai.
Question 11:
Have you ever been near a river or sea ? When ?
Answer:
I have been several times near river Ganges with my parents. It is because my maternal uncle lives at Roorkee.
Question 12:
Show with your hands, how the waves in the sea move ?
Answer:
As you know, the sea waves move up and down. The children are to show themselves the movement of the sea waves.
Question 13:
Is the water from the sea drinkable ? Why ?
Answer:
Since sea water is salty, it is not drinkable.
Question 14:
Do you think that there would be changes taking place in a river, pond or stream at different times of the year ? What kind of changes would these be ? Discuss.
Answer:
Changes to take place in a river, pond or stream at different times of the year. During rainy season there is more water and water is muddy. In winter, there is little water while in summer these even dry up sometimes.
Question 15:
Will there be the same amount of water in the ponds or rivers during the rainy season and in summer ?
Answer:
No, there will be more water during rainy season and less water in summer season.
Question 16:
Is there a pond, river or lake near your town or city ?
Answer:
Yes, there is a river near my town.
Question 17:
Are there any changes in the water during summers, the rainy season and in winters
Answer:
Yes, during rainy season there is more water and in winters and in summers, quantity of water is less.
Question 18:
What are the different kinds of water animals found there ?
Answer:
There are different kinds of fishes, small as well as large found there.
Question 19:
What kind of trees and plants grow around it ?
Answer:
Grass and Banana trees.
Question 20:
What are the kinds of birds that come there ?
Answer:
Many kinds of birds come there. Even migratory birds from other countries come there.
Question 21:
Have you ever seen or read about floods ? Where ?
Answer:
I have read about floods in Mumbai and Bihar. I have seen it live on T.V. also.
Question 22:
What happens when there is a flood ?
Answer:
There is water and water everywhere. There is a loss of life and property during floods.
Question 23:
Have you seen dirty water in a river or pond ? Where ?
Answer:
Yes, during rains.
Question 24:
How would you know if the water is dirty ? If the water looks clean, can you be sure that it is alright to drink that water ? Discuss.
Answer:
Even if water looks clean and transparent if may still contain certain dissolved impurities and micro organisms which can cause diseases. So we cannot be certain to say that this water is alright to drink.
Question 25:
Do you think that like the river in the picture your river or lake can also be affected ?
Answer:
From river. Yes, our river water can also be affected.
Question 26:
Do all things dissolve in water ?
Answer:
No, all things do not dissolve in water.
Question 27:
Does the colour of the water always change ?
Answer:
No.
Question 28:
Did oil dissolve in water ? How can you say whether it has dissolved or not ?
Answer:
No, oil does not dissolve in water. Since it does not disappear in water and forms a separate layer in water.
Question 29:
Colour of the water may not change even after some things are dissolved in it. Would you say that these are absent in water ?
Answer:
No, we cannot say that.
Question 30:
How is drinking water cleaned in your house ?
Answer:
First of all alum is added to water which helps to settle suspended particles of dust etc. Then it is poured out in some other vessel and filtered. In the end, chlorine tablets are added to this water to kill germs present, if any.