National Science Olympiad Forum By SOF Olympiad Trainer - Page 482
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ARSHAD RAIHAAN from BVM GLOBAL, CHENNAI
Subject :NSO    Class : Class 6

Ans 1:

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.

Ans 2:

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

Ans 3:

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

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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:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Bandana from ,
Class : Class 5
person should bend forward...wrong answer

Ans 2:

Ahaan Mittal from Primus Public School, Bengaluru
Class : Class 8

Ans 3:

Ahaan Mittal from Primus Public School, Bengaluru
Class : Class 8
In option c, the person must bend head forward to let blood darin out through nose and not down the throat. So option c is wrong.Also sitting is better than lying, as if nose is above heart that reduces the pressure, so option C is terribly wrong

Ans 4:

Deveshi Sachdev from venkateshwar international school, New Delhi
Class : Class 5
person should bend head slightly forward to not let the blood go through 6he throat. Even book is saying that. Answer Cis very wrong

Ans 5:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 6:

SUARGHYA CHATTERJEE from INDIA INTERNATIONAL SCHOOL, asansol
Class : Class 5

Ans 7:

Shaanvi from ,
Class : Class 5
wrong answer as the person should tilt his head sightly forward.

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Daksha Neill from Somerville school, Delhi
Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

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

Ans 3:

Daksha Neill from Somerville school, Delhi
Class : Class 7

Ans 4:

Meghatyoya from Adamas World School , Barasat
Class : Class 3
A

Ans 5:

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

Ans 6:

IKSHITA BARMAN from MVM-IV, Barsajai, GUWAHATI
Class : Class 9
C

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Arnav kaul from Chirec, Hyderabad
Subject :NSO    Class : Class 5

Ans 1:

Ritabrata Das from OPJS, Angul
Class : Class 7

Ans 2:

Avani from NPS International singapore, singapore
Class : Class 6
A is correct . Check on google

Ans 3:

Vihaan from Father Agnel, Noida
Class : Class 5
The relationship is Rabi crop: kharif crop.

Ans 4:

shaurya aggarwal from scholars rosary senior secondary school, rohtak
Class : Class 9

Ans 5:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
The relationship is Rabi:Kharif

Ans 6:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
I think the relationship is Kharif Crop: Kharif Crop. Then, option A cannot be correct as Barley is a Rabi crop while Maize is a Kharif crop.

Ans 7:

Mridul Jain from Shishukunj International School Indore, Indore
Class : Class 9
I think the relationship is ( Kharif Crop: Kharif Crop ). Then, option A cannot be correct as Barley is a Rabi crop while Maize is a Kharif crop.

Ans 8:

from kalyan, Kalyan
Class : Class 6

Ans 9:

Avani from NPS International singapore, singapore
Class : Class 6

Ans 10:

Kashvi Rawat from Gear Innovative International School, Bengaluru
Class : Class 3
The answer is correct. The relation is rabi : kharif .

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ARMAAN MITTAL from AMITY INTERNATIONAL SCHOOL, NOIDA
Subject :NSO    Class : Class 3

Ans 1:

Kavya Kaskar from Arya Vidya Mandir- Juhu, MUMBAI
Class : Class 5
B

Ans 2:

Pranaya Pathania from Ralli International School , Indirapuram
Class : Class 5
Syrup is not a gas.

Ans 3:

Dyuti Ghosh from Mount Litera Zee School , JAJPUR ROAD
Class : Class 3

Ans 4:

Archit Borkar from SSVM World School, Coimbatore
Class : Class 9
B and D both are incorrect.

Ans 5:

AYUSHMAN from St Marys Convent Sr Sec School Jaipur, JAIPUR
Class : Class 6

Ans 6:

saisavit from sri kumaran ps, bangalore
Class : Class 8
both B

Ans 7:

Dhruv Sachdev from Bhavan Vidyalaya, chandigarh
Class : Class 8
B

Ans 8:

Nishtha Mishra from bal bharti public school, new delhi
Class : Class 2
both B and D are incorrect

Ans 9:

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

Ans 10:

IKSHITA BARMAN from MVM-IV, Barsajai, GUWAHATI
Class : Class 9
B & D

Ans 11:

Alisha from Delhi Public School , bopal, Ahemdabad
Class : Class 8
why did not you send right answer clarification or correct options

Ans 12:

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

Ans 13:

Saptanshu Adhikary from Gopalan National School, Bangalore
Class : Class 3
B and D are incorrect

Ans 14:

Nishant Hazarika from Air Force School, Dibrugarh
Class : Class 3
D is incorrect.But B is also incorrect as both kerosene and syrup are liquid.

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ARMAAN MITTAL from AMITY INTERNATIONAL SCHOOL, NOIDA
Subject :NSO    Class : Class 3

Ans 1:

Akhil Vasanth from VIDYA MANDIR SENIOR SECONDARY SCHOOL CHENNAI TAMIL NADU, Chennai
Class : Class 2
Crecent to Newmoon to Crecent to Full Moon. Answer is A

Ans 2:

Saathvik Sriram from euroschool whitefield, Bangalore
Class : Class 5
answer is A not B

Ans 3:

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

Ans 4:

Sourish Mahakul from Delhi Public School Electronic City, Bengaluru
Class : Class 8
Answer is A

Ans 5:

Alina Chattopadhyay from Tagore International School, Vasant Vihar, New Delhi, South Delhi
Class : Class 6
Huh i got it wrong . it was v easy

Ans 6:

IKSHITA BARMAN from MVM-IV, Barsajai, GUWAHATI
Class : Class 9
A

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rocker harshil from TImpany senior secondary school, Visakhapatnam
Subject :NSO    Class : Class 6

Ans 1:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Ya Sharmi is correct, ten-cent coin is also always magnetic

Ans 2:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9

Ans 3:

ATHARV RAHUL MAHAJAN from ST. STEPHENS SCHOOL CHANDIGARH, SAS NAGAR
Class : Class 6
Steel is not a magnetic material

Ans 4:

Mihika Raut from ST JOSEPHS SCHOOL, RIHAND NAGAR
Class : Class 8
steel ball bearing is a conducter that is why it is able to drag the box with it.

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Yes steel ball bearing is the best option ....... but i think ten cent coin is also magnetic ... but let it be option A {STEEL BALL BEARING}

Ans 6:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Isn't a ten-cent coin also magnetic?

Ans 7:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
Yes it is... yet a steel ball bearing is the best option

Ans 8:

Ayansh Mallick from Birla Open Minds, Hyderabad
Class : Class 7
guys isnt the iron nail not magnetic it shouldn't" have poles in the first place its like saying a coin is a magnet

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