National Science Olympiad Forum By SOF Olympiad Trainer - Page 692
  1. Home
  2. /  Forum

User Forum

Ask Your Question
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:

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

Ans 3:

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

Ans 4:

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

Post Your Answer

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

Ans 1:

harry potter from hogwarts, hogsmeade
Class : Class 6

Ans 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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 14:

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

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: (Master Answer)

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

Ans 2:

Vibhor Mudgal from GBN School, Faridabad
Class : Class 4

Ans 3:

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 4:

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 5:

Mihika Talukdar from GARDEN HIGH, KOLKATA
Class : Class 4

Ans 6:

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

Ans 7:

Raashid Sarfraz from IIPS, Riyadh
Class : Class 6

Ans 8:

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

Ans 9:

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 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

Gurnoor from Chitkara International School, Chandigarh
Class : Class 4
ans is c

Ans 14:

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

Post Your Answer

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

Ans 1:

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 2:

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

Ans 3:

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.

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:

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

Ans 7:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 7

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:

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

Ans 7:

Shivani Shivu Singh from Pawar Public School Chandivili , Mumbai
Class : Class 7

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 7
please give explanation Admin.

Ans 3:

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

Ans 4:

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 5:

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

Ans 6: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

The correct answer is C.


Ans 7:

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

Ans 8:

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

Ans 9:

ibrahim akhil pathan from kaka's international school, pune
Class : Class 4
explain please

Ans 10:

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 11:

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

Ans 12:

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

Ans 13:

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

Ans 14:

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.

Post Your Answer