National Science Olympiad Forum By SOF Olympiad Trainer - Page 726
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Shaunak Mahapatra from Mount Litera Zee School, Contai
Subject :NSO    Class : Class 6

Ans 1:

Ritabrata Das from OPJS, Angul
Class : Class 7
It should be both a

Ans 2:

Aishwarya B from Shantiniketan International School , Hyderabad, HYD
Class : Class 9
D

Ans 3:

Suhani Agarwal from St. Mary's ICSE School, Mumbai
Class : Class 8

Ans 4:

Satwik Dixit from Christ Academy, Bangalore
Class : Class 7
its definitely a

Ans 5:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI
Class : Class 8
It is C.. Cuz the fulcrum is at one end..

Ans 6:

Aishwarya B from Shantiniketan International School , Hyderabad, HYD
Class : Class 9
I meant c

Ans 7:

Kaashvi Sharma from Bal Bharati Public School, GRHM, New Delhi
Class : Class 8

Ans 8:

Lakshmi from FPS, Bangalore
Class : Class 10
It will not be A because in first class lever the fulcrum lies between load and effort but in hammer effort lies between fulcrum and load

Ans 9:

Aarya Singh from Indian School Ghubra, Muscat
Class : Class 3
It's A, as in a hammer, the fulcrum, that is the place were the head of the hammer and rod of the hammer meet is in center, the load which is the nail is on one end and the effort we apply is on the other end

Ans 10:

Aprameyan Baranidar from Seven senses Montessori, Bengaluru
Class : Class 6
It is A

Ans 11:

Arjun gupta from Dps noida , Noida
Class : Class 7
should be A

Ans 12:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
A means A. Aarya you are right

Ans 13:

harry potter from hogwarts, hogsmeade
Class : Class 6

Ans 14:

Pratham Dave from GNS, Bangalore
Class : Class 7
It shows that the effort is in between and load and fulcrum are at the ends .

Post Your Answer

Bibhu biswajit Jena from Kendriya Vidyalaya, Kendrapara
Subject :NSO    Class : Class 8

Ans 1:

ketaki kul from sanskriti school, Pune
Class : Class 10
Mirage is an optical illusion caused due to refraction of light.

Post Your Answer

AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

Post Your Answer

AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

Post Your Answer

AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

Post Your Answer

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

Ans 1:

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

Ans 2:

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 3:

Vibhor Mudgal from GBN School, Faridabad
Class : Class 4

Ans 4: (Master Answer)

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

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:

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 10:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 11:

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

Ans 12:

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

Ans 13:

Rishaan Dixit from DPS Noida, Noida
Class : Class 5
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 14:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Post Your Answer

AKSHITA.KRISHNAN from DPS Noida, Noida
Subject :NSO    Class : Class 3

Ans 1:

Soham from Golden Earth Global School, Sangrur, Sangrur
Class : Class 3
A

Ans 2:

SARTHAK.SHUKLA from Delhi Public School, Noida, Noida
Class : Class 3
Answer is D because at night plants take in oxygen and give out carbon-di-oxide whereas we humans always take in oxygen and give out carbon-di-oxide.

Ans 3:

from M G M Senior Secondary school Sec-6,
Class : Class 5
A

Ans 4:

SAMRIDDHA PANDA from ST. MONFORT'S SENIOR SECONDARY SCHOOL, BARUIPUR
Class : Class 7

Ans 5:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
ans is A as the order of gases will not change

Ans 6:

Abhijay Saha from Delhi Public School, Megacity, Kolkata
Class : Class 3
We Don't know that plants breath oxygen in night

Ans 7:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
Sorry ,answer is A .I gave wrong explanation why .You have told arerespectively, so gas 1 is carbon dioxide and gas 2 is oxygen.You have given the order as 1 and 2 i.e. carbon dioxide and oxygen.So ,we will say it as 2 and 1 i.e oxygen and carbon dioxide .Hence answer is A.

Post Your Answer

AKSHITA.KRISHNAN from DPS Noida, Noida
Subject :NSO    Class : Class 3

Ans 1:

BRIHA PURI from CAMBRIDGE PUBLIC SCHOOL, BANGALORE
Class : Class 3
understood

Ans 2:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 8

Ans 3:

Abhijato Chatterjee from Bharatiya Vidya Bhavan, Kolkata, kOLKATA
Class : Class 6
why?

Ans 4:

SARTHAK.SHUKLA from Delhi Public School, Noida, Noida
Class : Class 3
Answer is asymmetrical figure, because all the other figures are symmetrical.

Ans 5:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
The images given in Options A, B and D are symmetrical images. That means all three have at least one line of symmetry. Line of symmetry is any line drawn through the image which divides the image into two exactly equal parts, and these parts are mirror images of each other. A.The part above the red line (line of symmetry) and the 7part below the red line are mirror images of each other.7410`1 B.The parts on both sides of the red line (line of symmetry) are mirror images of each other. C.There can be no line of symmetry that can divide this image into two equal parts which are mirror images of each other. D.The part on the left side of the red line (line of symmetry) and the part on the right side of the red line are mirror images of each other. Hence, Option C is the odd one out.

Ans 6:

akshitha from Euroschool, Bengaluru
Class : Class 3
i cant understand the second question c] or b]?

Ans 7:

Keisha Raj from SVIS Kandivali, Mumbai
Class : Class 6

Ans 8:

BRIHA PURI from CAMBRIDGE PUBLIC SCHOOL, BANGALORE
Class : Class 3
nonsense question

Ans 9:

Gaurang Mahesh Mahamunkar from Lodha World School Thane, Thane
Class : Class 4
Figure A can be folded horizontally, figure B can be folded diagonally, figure D can be folded vertically to get their mirror images whereas figure C is asymmetric, so the odd one out is figure C

Ans 10:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 8

Ans 11:

Ananya D from Sacred Heart School, Thane
Class : Class 8

Ans 12:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
ANS should be a

Ans 13:

Tanisha Nath from Clarence Public school Bangalore, Bengaluru
Class : Class 9
why

Ans 14:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.


Ans 5:

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

Ans 6:

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 7:

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

Ans 8:

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 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

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

Post Your Answer

Supreet Birdi from Global Indian International School, Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Pratham Gupta from P G Garogdia, Mumbai
Class : Class 5
Correct answer is C

Ans 2:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 7
I did it c but according to SOF, it is a.

Ans 3:

Mathamagician from BGSNPS, Bengaluru
Class : Class 6
EASY. It is a). FOund it very quickly. I wonder why many of you put c)

Ans 4:

Rimi from TLISK, pune
Class : Class 9
OH mene to d kiya tab laga ki sab wrong the.oh my god now acinfusing yar

Ans 5:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
but read the question... you have to select the incorrect ans

Ans 6:

Preeti tanwar from DON BOSCO ACADEMY, Patna
Class : Class 9
c

Ans 7:

Syeda Safina Taj from Federal public school, Bengaluru
Class : Class 4
Answer a

Ans 8:

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

Ans 9:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5
the answer is a but i did it c

Ans 10:

Ashee Srivastava from APEEJAY SCHOOL NOIDA , NOIDA
Class : Class 7
But a is the answer .

Ans 11:

Prerona Chatterjee from Delhi Public School North Kolkata, Kolkata
Class : Class 5
actually the picture P is wrong . they want to express it as pivot joint.

Ans 12:

Rohan TR from Sri Aurobindo memorial school, Bangalore
Class : Class 6
Soumya raj is correct

Ans 13:

Praket Tejas from Delhi Public School Indira Nagar Lucknow, Lucknow
Class : Class 4
iojkbn

Ans 14:

KONDURU TEJESH from Sri chaitanya international school, Bangalore
Class : Class 4
p is not pivot joint but a ball and socket joint but according to me c is the correct ans

Ans 15:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
The correct answer is A) according to SOF

Ans 16:

Rimi from TLISK, pune
Class : Class 9
its a

Ans 17:

Goutham Ram from Lecole' Chempaka International, Trivandrum
Class : Class 5

Ans 18:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
SOF is wrong . The answer should be C as Ball and socket joint is only found in arms and legs . It cannot come in the skull . Smita De is also absolutely right .

Ans 19:

Ashwak from Cambridge, Jalandhar
Class : Class 9
I think the answer is A

Ans 20:

marika from VTS, Mumbai
Class : Class 4
cool question

Ans 21:

Riya from Bhavan Vidyalaya, Chandigarh
Class : Class 8
good question sligjhtly tricky

Ans 22:

bharati nath from Springdale high school, Kalyani
Class : Class 6

Ans 23:

Biju Pappachan from Rkc , Raipur
Class : Class 1
The correct ans is A.

Ans 24:

Ashwak from Cambridge, Jalandhar
Class : Class 9

Ans 25:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5

Ans 26:

Ayushmaan from D, B
Class : Class 5
Nice question

Ans 27:

Pratham Dave from GNS, Bangalore
Class : Class 7
All of them are incorrect so the answer is D

Ans 28:

Advaith from National Public School, HSR Layout , Bengaluru
Class : Class 8
The question is asking to select the incorrect question, but option C is correct and option A is wrong so A is the correct answer

Ans 29:

Devasree from Presidium, Ghaziabad
Class : Class 10
Soumya raj is correct answer should be c as ball and socket joint is only found in legs and arms and it is definitely not found in the skull .

Ans 30:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
Yes, it is true, we can compare the movement to the joint mentioned as "P" with that of a joystick. It is a ball-socket joint, and it is found in the shoulders and the hips.

Ans 31:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
The correct answer is a but i did it wrong... (i did ans C)

Ans 32:

Agastya Tripathi from dps gurgaon, Gurgaon
Class : Class 4

Ans 33:

Smita De from Bishop Cotton Girls School, BANGALORE
Class : Class 5
correct answer is supposed to be C. But according to SOF it is A.

Ans 34:

Arav Gupta from Delhi Public School Gurgaon, Gurgaon
Class : Class 8
And the question said to find the incorrect option! So a.

Ans 35:

anita from Manan Vidya Ranchi, Ranchi
Class : Class 4
D

Ans 36:

Ashwak from Cambridge, Jalandhar
Class : Class 9
It's simple

Post Your Answer