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karunesh tiwari from SJ education centre , Kanpur
Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Please mention your query

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Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 7

Ans 1:

Nussrat from Army Goodwill Public School Rajouri, Rajouri
Class : Class 7
42

Ans 2:

Dheeraj from Sri Sri Ravishankar Vidya Mandir, Bangalore
Class : Class 7
The answer is 42!!!

Ans 3:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 8
It's 42 guys

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Bhavana Goswami from South City International, Kolkata
Subject :NSO    Class : Class 10

In the following figures, optical instruments are placed inside boxes (A) and (B). Which of the following options is correct for these?


A In (A), the incident rays are diverged after refractions, so lens is concave.
B In (B), the incident rays are converged after refraction so mirror is convex.
C In (A), the incident rays are diverged after refraction so mirror is convex.
D In (B), the incident rays are converged after refraction so lens is concave.


Aren't both options A and B correct?

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the correct answer is A. In (A), the incident rays are diverged after refraction, so the lens is concave and in (B), the incident rays are converged after refraction, so the lens is convex.

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Aarush Laddha from NCFE, bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Agustya vaid from Somerville school vasundhara enclave, Delhi
Class : Class 6
in short words this was easy

Ans 2:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 7
WHAT IS THE CLASS THIS IS LIKE MATHS

Ans 3:

Anshuman Mishra from kv no 3, Bhubaneswar
Class : Class 7
the ans will be c

Ans 4:

Manvi Mundepi from Montfort School Roorkee, Roorkee
Class : Class 7
WHAT IS THE CLASS THIS IS LIKE MATHS

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is C. Displacement is the shortest distance covered by a body. In a circular path, the distance between the initial point (Here=P) and the final point (Here=Q) will give you the displacement. Here, Shortest distance between P and Q is PO + OQ = a + a = 2a Hence, the displacement of the cyclist would be 2a.

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Sheethal from Global public school, Ernakulam
Subject :NSO    Class : Class 6

Ans 1:

Aarush Laddha from NCFE, bengaluru
Class : Class 6
Answer is C because Y is minerals.Minerals are inorganic.Excess consumption of minerals does not cause obesity.So they have told to mark incorrect answer.Therefore C is correct

Ans 2:

Preeti tanwar from DON BOSCO ACADEMY, Patna
Class : Class 6
c

Ans 3:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 6
c

Ans 4:

Pratul Kumar Sahoo from Presidium, Gurugram
Class : Class 4
c

Ans 5:

kpks14 from RIMT World School, Chandigarh
Class : Class 7

Ans 6:

from , Dehradun
Class : Class 7
The answer is c

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Ayush sharma from GEMS international school , Gurgaon
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is B. Since in a magnetic needle the arrow head is the North Pole, it will point towards the South Pole of the left hand side magnet and the other end of the magnetic needle (i.e; South Pole) will point towards the North Pole of the right hand side magnet.This is because like poles repel and unlike poles attract each other. Hence,the polarity of the end P of the right hand side magnet is North.

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is B. Since in a magnetic needle the arrow head is the North Pole, it will point towards the South Pole of the left hand side magnet and the other end of the magnetic needle (i.e; South Pole) will point towards the North Pole of the right hand side magnet.This is because like poles repel and unlike poles attract each other. Hence,the polarity of the end P of the right hand side magnet is North.

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Aditya Sai Vemparala from Amanora school, Pune
Subject :NSO    Class : Class 7

Read the given passage carefully and answer the question

The phenomenon in which a bird or other animal moves from one place to another in one season, and returns again in a different season is called migration. It is an adaptation to escape the harsh conditions of their normal habitat so as to survive.

The __(i)__ flies from its native place in Russia to places like __(ii)__ in Rajasthan and __(iii)__ in Haryana during a particular season.

It stays in India for a few months and then goes back in __(iv)__ season. The general name given to birds like these is __(v)__ birds. Select the correct sequence of words to fill up the blanks in the above passage.

Which of the following is the probable method these migratory birds use to travel to the same place year after year?

(i) (ii) (iii) (iv) (v)
A Toucan Sultanpur Bharatpur Autumn Adaptatory
B Siberian
crane 		Bharatpur Sultanpur Winter Migratory
C Arctic
tern		 Bharatpur Sultanpur Spring Migratory
D Siberian
crane		 Sultanpur Bharatpur Summer Adaptatory


Ans 1:

Dheeraj from Sri Sri Ravishankar Vidya Mandir, Bangalore
Class : Class 7
The answer is C!!!

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Kindly mention your query

Ans 3:

Dheeraj from Sri Sri Ravishankar Vidya Mandir, Bangalore
Class : Class 7
The answer is C!!!

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Shweta Garg from apeejay school noida, Ghaziabad
Subject :NSO    Class : Class 5

Ans 1:

SOUMYARAJ ROY from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 5
Tricky , hard and somewhat funny .

Ans 2:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3

Ans 3:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3

Ans 4:

Swastik from st marys school, new delhi
Class : Class 6
the answer is B

Ans 5:

RISHABH from SUMMER FIELD, GURGAON
Class : Class 5
B

Ans 6:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3

Ans 7:

Shweta Garg from apeejay school noida, Ghaziabad
Class : Class 3

Ans 8:

ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Class : Class 5
ANSWER IS B

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Anjana Kulkarni from Oakridge International School, Hyderabad
Subject :NSO    Class : Class 3

Ans 1:

Latika Bose from Sai International school , Bhubaneswar
Class : Class 4
In the book it is given a as answer, then why b in trainer why why why?

Ans 2:

Ayush kumar from Lala Kailashpat Singhania High School , Chhindwara
Class : Class 4

Ans 3:

Arjun from chirec heydrabad, heydrabad
Class : Class 3
Admin ka bacha it is a

Ans 4:

Ashmi Narkar from Shishukunj International School , Indore
Class : Class 3
SAIKARAN and kailash patra, you are right . SOF , check your book (if you have any left) .

Ans 5:

ARNAV VYAS from d r amin memorial school, VADODARA
Class : Class 3
Without air(oxygen) the grasshopper will die even food or water is given,so answer is A.

Ans 6:

subhang sarkar from Aditya Academy, Kolkata
Class : Class 3
awnser will be A because air is mch important then food and water.

Ans 7:

Pankaj Rajput from RBK GLOBAL SCHOOL, THANE
Class : Class 3
If it is food then grasshopper will die after 2,3 days but it is writen after some times so it is a

Ans 8:

kailash patra from dav public school, berhampur
Class : Class 3
question is about sealed glass box,so there is no supply of oxygen,hence answer is 'a' only.

Ans 9: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
Here, the answer is B. Air, water and food are necessary for the survival of any living organism. So, in the absence of any one of these components an organism cannot survive. Hence, the grasshopper died due to the lack of air and food, although water was provided.

Ans 10:

aarav m from kumarans, bengaluru
Class : Class 3
But in the book its a

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shashanka from dps, duliajan
Subject :NSO    Class : Class 8

Ans 1:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
The correct option is B

Ans 2:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
The correct option is B

Ans 3:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8

Ans 4:

AAshutosh Jindal from HOLY angels school, RAJPURA
Class : Class 8
The correct option is B

Ans 5:

Anirudh from Kendriya Vidyalaya Kanjikode, Palakkad
Class : Class 8
The right one is option 'A'-30 mins

Ans 6:

Mukesh Goel from S.M. Shetty Hogh School & Jr. College, Mumbai
Class : Class 8
A

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