National Science Olympiad Forum By SOF Olympiad Trainer - Page 112
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Rohan David from Oakridge International school, Hyderabad
Subject :NSO    Class : Class 4

Ans 1:

Adarsh from DPS, Raipur
Class : Class 5
The correct answer is c

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
C C c everyone can seethe answer is Ceveryone plz agree

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is C.

Ans 5:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
The correct option is c

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Aditya Avadhani from Deens Academy, ECC road, Whitefield, Bengaluru
Subject :NSO    Class : Class 4

Ans 1:

Sreejani Bhaduri from National Public School, Bangalore
Class : Class 10
Ps

Ans 2:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10
same

Ans 3:

Gunnit Kant from DPS, Nerul, Navi Mumbai
Class : Class 5
c

Ans 4:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
no no ans should be d because how will we get petrol

Ans 5:

Bhavya Sheth from Bright Day School, Vadodara
Class : Class 6
Yes answer should be D because I also think like Vidhya M.

Ans 6:

Harshit from Montfort , Delhi
Class : Class 7
its c

Ans 7:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7
D is the ans

Ans 8:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
Maybe dry cleans have a chemical that contains petrol for oil grease

Ans 9:

SHUVRA MAITRA from THE HERITAGE , KOLKATA
Class : Class 4

Ans 10:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata
Class : Class 7
Answer is most probably C

Ans 11:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4
yes ans should be d

Ans 12:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 13:

Shivam Chablani from The Shriram Millenium School , Faridabad
Class : Class 5
The answer should be D

Ans 14:

Avya Pandey from NPS International, Singapore
Class : Class 8
it should be D

Ans 15:

NARAYANAN VENKITASUBRAMANI from THE PSBB MILLENNIUM SCHOOL, Coimbatore
Class : Class 8

Ans 16:

somesh from Centre point katol road, Nagpur
Class : Class 6
B

Ans 17:

SUHARSH SAXENA from dpsnoida, Noida
Class : Class 5
No d is not the answer I have google it it is showing g that a Is a bad idea

Ans 18:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 19:

Vidhya M from Vibgyor High Bannerghatta, Bangalore
Class : Class 7
I don't believe that fresh ink stains can be removed with talcum powder and oil and grease can be removed with petrol. I think the answer should be "D"

Ans 20:

Aarav from SNBP, Pune
Class : Class 4
It’s c because talcum powder does work on fresh ink stains and petrol works on oil and grease everyone should know that cotton need soft detergent

Ans 21:

avsonawane from Blue Ridge Public School, Pune
Class : Class 9
the correct option shall be "D". The answer marked in the system shall be reviewed...

Ans 22:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8
Explanation please

Ans 23:

Goutham from lt, Chennai
Class : Class 4
The answer should be D. How can A and B be correct?

Ans 24:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is C

Ans 25:

Anshuman raj from STCS, Karnal
Class : Class 9
Actually fresh ink stains can be lighten by using talcum powder and in dry cleans stores petrol is used to remove oil and grease So from my side C is the answer

Ans 26:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7

Ans 27:

ishi gupta from DPS NOIDA, NOIDA
Class : Class 4

Ans 28:

Samarth Vijay Yeliathaya from Shri Kumarans Children home,cbse, Bangalore
Class : Class 5
Even I thought 'D' is the answer

Ans 29:

Midhuna from ABCD, Banglore
Class : Class 3
Answer is C

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pydimarri@gmail.com from Vibgyorhigh, Bengaluru
Subject :NSO    Class : Class 4

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Navneeth Reejish from Yuvabharati International school, Singapore
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Agnimitra Gupta from south point school, Kolkata
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is D.

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Ambit Biswas from Oriental Public School, Kalyani, Kalyani
Subject :NSO    Class : Class 4

Ans 1:

sai ramakrishna GUDIMETLA  from AMM MATRICULATION HIGHER SECONDARY SCHOOL, Chennai
Class : Class 5
ans:none of these 365 days 6 hours

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OISHIK KUNDU from Delhi Public school North kolkata, baranagar
Subject :NSO    Class : Class 4

Ans 1:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
d is the answer

Ans 2:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7
Can you tell the answer to this question

Ans 3:

Tvisha Bindal from Manav Rachna International School Sector 14, Faridabad
Class : Class 4
Its D

Ans 4:

Shaurya Suryawanshi from The Orbis school, Pune
Class : Class 7
it's 'd' or 'a'..... not sure

Ans 5: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Ans 6:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
please help help master answer explain

Ans 7:

Sheel Mehta from Riverside, Ahmedabad
Class : Class 4
The Correct Answer Is A

Ans 8:

Harini from vibgyor high, bangalore
Class : Class 3

Ans 9:

Tvisha Bindal from Manav Rachna International School Sector 14, Faridabad
Class : Class 4
not sure

Post Your Answer

SHREYASHI.CHANDRA from DPS Noida, Greater Noida West
Subject :NSO    Class : Class 4

Ans 1:

Sukrit from Swami vivekanand high school , Mumbai
Class : Class 6
HOW MANY SQUARES ARE THERE AND GIVE SOLUTION

Ans 2:

Kavitharini Joseph from HUS, Chennai
Class : Class 6
i cant count please give solution

Ans 3:

arpita Jaiswal from bhartiya vidya bhavan, wardha
Class : Class 4
Please give solution

Ans 4:

ADITYA ROY from VIDYASAGAR SHISHU NIKETAN, MEDINIPUR
Class : Class 5
This answer should be three.

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Pratibha from Vaels billabong international, Chennai
Subject :NSO    Class : Class 4

Ans 1:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
C

Ans 2:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Ans 3:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 4:

Abhigyan Sinha from Podar International School, Powai, Mumbai, Mumbai
Class : Class 7
correct answer is C

Ans 5:

Aarush Pandya from Inventure Academy, Bangalore
Class : Class 8
The correct answer is C because if organism X wipes out all tadpoles in the community, then water insects' population grows with nothing to eat them. The small fish die because they have nothing to eat, and soon the big fish die too.

Ans 6:

Rishaan Dixit from DPS Noida, Noida
Class : Class 6
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 7:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Aarush , there will be not enough plants to feed so many water insects . So, at a particular time all plants will finish . So , there will be nothing left for the water insects so they will also die !

Ans 8:

Manjeet Prajapati from Saint Xavier College BHEL Jhansi , Jhansi
Class : Class 4
In the given food chain, tadpole feeds on water insect and in turn is eaten by small fish. If population of tadpole will decline with time then small fish population will also decrease as former is the food of later. On the other hand, water insect population will be positively affected because in the absence of predator prey population reproduces and flourishes.

Ans 9:

k tagore from montessori school, KURNOOL
Class : Class 3
The correct answer is c

Ans 10:

Vibhor Mudgal from GBN School, Faridabad
Class : Class 4

Ans 11:

Manan thorat from Podar powai, Mumbai
Class : Class 4
The answer is C

Ans 12:

Gurnoor from Chitkara International School, Chandigarh
Class : Class 5
ans is c

Ans 13:

Priyanshi from Delhi Public School, Gurugram
Class : Class 4
the correct answer is C

Ans 14: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Mridul Jain from Shishukunj International School Indore, Indore
Subject :NSO    Class : Class 4

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The answer is C

Ans 2:

somesh from Centre point katol road, Nagpur
Class : Class 6
d

Ans 3:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
no u DUMMIES! winter should be on the east side of the earth and summer on the west and Goutham this question is sooooo WRONG! and ur wrong Goutham

Ans 4:

Vivaan from Rustomjee Cambridge International School and Junior College, Mumbai
Class : Class 6
C

Ans 5:

Shrinikethan S from Padma Seshadri Bala Bhavan Senior Secondary School, K. K. Nagar,, Chennai
Class : Class 5
how do you all know the correct answer is 'C' when everything seems correct.

Ans 6:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8
please give explanation Admin.

Ans 7:

Anwita from Gea, Mumbai
Class : Class 4
it also can be d explain how please admin cant understand

Ans 8:

Shashank Reddy from Gyan Ganga International School, Pune
Class : Class 5
C

Ans 9:

XXX from SVM, Bangalore
Class : Class 5
please explain how is it c?

Ans 10:

SWARIT JAIN from DPS Greater Noida, GREATER NOIDA
Class : Class 9
C

Ans 11:

Pranav Verma from DPS Pal Road , Jodhpur
Class : Class 4
D is correct

Ans 12: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.


Ans 13:

Abhigyan Sinha from Podar International School, Powai, Mumbai, Mumbai
Class : Class 7
correct answer is C

Ans 14:

Goutham from lt, Chennai
Class : Class 4
I. This is so EZ.t can be c as N is on the top and S is down plus when the north recives cold it is hot in the south and when the south is cold it is hot in the north

Ans 15:

Shariya akhil pathan from kaka's international school, pune
Class : Class 3
explain please

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