National Science Olympiad Forum By SOF Olympiad Trainer - Page 461
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SRISANTH from Edify, Tirupathi
Subject :NSO    Class : Class 4

Ans 1:

Khanak Jha from Prime Academy, Mumbai
Class : Class 4
Even I agree

Ans 2:

Sanaya Singh from Hiranandani Foundation, Mumbai
Class : Class 2
D is the answer because when we put talcum powder on the board, the carrom is easy to slip. Therefore, it reduces the force that keeps us from slipping while we are walking.

Ans 3:

SRISANTH from Edify, Tirupathi
Class : Class 5
D is the correct answer

Ans 4:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
Thanks Ashwak

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I agree, D is the correct answer.

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Advaitt S Koduri from Presidium Noida 31, NOIDA
Subject :NSO    Class : Class 3

Ans 1:

aarav m from kumarans, bengaluru
Class : Class 3
Ussain Bolt

Ans 2:

Soham Nandy from The Frank Anthony Public school, Bangalore
Class : Class 3
Usain Bolt

Ans 3:

aarav m from kumarans, bengaluru
Class : Class 3
Ussain Bolt

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Arpit Sahoo from SAI International School, Bhubaneswar
Class : Class 7
D

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
B

Ans 3:

Hamsini from yagappa international school, Thanjavur
Class : Class 5
d is the answer

Ans 4:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
B

Ans 5:

Hamsini from yagappa international school, Thanjavur
Class : Class 5

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Kanav Dhingra from DPS sec45, Gurgaon
Subject :NSO    Class : Class 4

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Kshitij from Sams, Bangalore
Subject :NSO    Class : Class 6

Read the given statements and select the correct option
Statement 1 : The rainwater flows down the mountain slopes, leaving very little water for the trees to absorb.
Statement 2 : To conserve water, the leaves of the pine trees are needle-like to reduce the loss of water due to evaporation.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true and statement 2 is false.
DBoth statements 1 and 2 are false.


Ans 1:

Aryadeep Sen from The Calcutta Boys School, Kollkata
Class : Class 7

Ans 2:

abhijit majhi from de paul school, berhampur
Class : Class 6
asdfghjkl;

Ans 3:

Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore
Class : Class 7
it is a!!!!

Ans 4:

Mantavya Dixit from DAV Shreshtha Vihar, Delhi
Class : Class 7
C

Ans 5:

Ahana Mandal from Delhi Public School Asansol , Asansol
Class : Class 6

Ans 6:

Devaj Parekh from Choithram School North Campus, Indore
Class : Class 6
Answer A is correct

Ans 7:

Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore
Class : Class 7
asdfghjklz

Ans 8:

Ahana Mandal from Delhi Public School Asansol , Asansol
Class : Class 6

Ans 9:

rashi from rosary, delhi
Class : Class 6

Ans 10:

Mishika from Delhi Public school, Chandigarh
Class : Class 6
answer should be a

Ans 11:

abhijit majhi from de paul school, berhampur
Class : Class 6
wrong

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Kshitij from Sams, Bangalore
Subject :NSO    Class : Class 6

Which of the following statements are correct?.
(i) The process of making yarn from fibres is called as spinning.
(ii) Ginning is the process by which harvested cotton is dried and fibres are separated from their seeds.
(iii) Jute is a biodegradable fibre and replenishes earth's nutrients.
(iv) Jute fibres are composed primarily of cellulose only.

A(i) and (ii) only
B(i), (ii) and (iii) only
C(i), (ii), (iii) and (iv)
D(iii) and (iv) only


jute fiber is composed of cellulose and lignin.info;https://en.wikipedia.org/wiki/Jute Jute fibers are composed primarily of the plant materials cellulose and lignin.2nd paragraph 1st line ending

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ARSHAD RAIHAAN from BVM GLOBAL, CHENNAI
Subject :NSO    Class : Class 6

Ans 1:

Ashher Pervez from DPS Bhilai, Bhilai
Class : Class 10
C,as the wheat plants decrease in number.

Ans 2:

Ashi Goyal from Sacred heart convent school,raikot road,barnala, punjab
Class : Class 6

Ans 3:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
In a field research, some rats were kept in a wheat field. Their presence in the wheat field would affect the number of wheat plants over a certain period of time.Rats burrow in the soil of wheat field and cause damage to the crop roots. So, the number of wheat plants would fall over a period of time. Rats also feed on ripening ear heads and ripened grains. So, their population would increase fast. The more they are in number, the more damage they would cause to the plant roots, and the more grains they would eat.So, the number of wheat plants in the field would keep decreasing.The following graph would show the change in the number of wheat plants correctly:In the above graph, the number of wheat plants is constantly falling over a period of time. Hence, the right answer is Option C.

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Smita De from Bishop Cotton Girls School, BANGALORE
Subject :NSO    Class : Class 5

Ans 1:

Divyanshi from United international School, Bangalore
Class : Class 6
but others also produce heat energy?

Ans 2:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7
It will be option D. It will be D as it can be understood from the pictures that S is a room heater which is run by electric. Heat comes out of it. It is therefore used to keep our surroundings warm. Thank you .

Ans 3:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata
Class : Class 7

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Devansh pralhad patil from Nirmal international school pachora, Pachora
Subject :NSO    Class : Class 6

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Shreetej from Pearson public school, Pune
Subject :NSO    Class : Class 5

Ans 1:

SAMARTH GOYAL from DPS SANGRUR, SANGRUR
Class : Class 6
coal and petroleum are non renewable sourcesbut wind is made up of air and air contains so many gases .Therefore wind cannot be exhausted so wind is renewable resources

Ans 2:

Pratham Dave from GNS, Bangalore
Class : Class 7
Answer is C.

Ans 3:

ahaladita jain from delhi public school agra, Agra
Class : Class 5
Answer is c because coal and petroleum can be finished but wind will never get finished

Ans 4:

SANVI ROHILLA from The little shri, Rohtak
Class : Class 5
C

Ans 5:

Ishan sandip chaudhari from Divine Child International School, Ahmedabad
Class : Class 5

Ans 6:

Gayatri Iyer from Sanskriti School, Pune
Class : Class 9
It is C , guys....

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