NCERT Solutions Class 4 Environmental Studies Chapter 7 From The Window

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Q.1. What was the differences in the scenery that Omana saw from the train on the first day and on the second day?

Ans. On the second day it was green field outside. While on the first day she saw the station.

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Ans. Bus, car, truck, auto richshaw, motor cycle, scooter run on diesel or petrol.

Q.2. Why was there smoke and noise from the vehicles at the level crossing?

Ans. Some vehicles did not stop engine. It is the smoke from the engines that get collected.

Q.3. Have you ever seen a scene like the one Omana saw in Gao? Describe it.

Ans. Yes. I have seen such scene in a village in Uttar Pradesh. There are large green fields where crops are cultivated.
 

Success (Page 55)

Q.1. Sometimes people cross the tracks even when the crossing is closed. What do you feel about this?

Ans. People should not do like this. There is no point to take such risk. Life is costless.

Q.2. Have you see any bridges? Where?

Ans. Yes. On the river.

Q.3. Have you ever crossed a bridge? Where?

Ans. Yes, Delhi.

Q.4. What did you see below the bridge?

Ans. Water.

Q.5. Find out why bridges made are.

Ans. Bridges help us to cross rives, uneven areas easily.

Q.6. Have you ever been through a tunnel? How did you feel?

Ans. Yes, I felt nervous.

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Q,1. The route from Goa to Kerala has a total of 2,000 bridges and 92 tunnels! Why do you think there are so many bridges and tunnels?

Ans. The route is full of mountains and rivers.

Q.2. Imagine if on the way there had been no tunnels and bridges, how would Omana’s train have crossed the mountains and rivers?

Ans. No, one train cannot cross mountains and rivers without tunnels and bridges.

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Q.1. What language doyou speak at home?

Ans. My mother tongue Hindi.

Q.2. On the way from Gujarat to Kerala Omana’s train went through several states of our country. Find out and list which states it crossed.

Ans. Maharashtra, Tamil Nadu etc.

Q.3. Find out in which states these languages are spoken?

Ans.

Q.4. What do you call them?

Ans. (a) Your mother’s Sister : Mausi

(b) Your mother’s mother : Nani

(c) Your father’s sister : Bua

(d) Your father’s mother : Dadi

Question. See these three pictures showing Vinod, Santosh and Sarah standing near the SAME tree. Which of these correctly shows the three of them together?

Answer : B

Question. Smoke from factories, cars and burning of garbage causes________.? 
(a) air pollution
(b) water pollution
(c) sound pollution
(d) soil pollution

Answer : A

Question. Which of the following traffic signs is likely to be found near a hospital?    

Answer : A

Question. Mangal observed the shape of the moon at three different times on one night at about 8 PM, 10 PM and 1 AM. Which of these could be the correct set of figures?

Answer : A