National Science Olympiad Forum By SOF Olympiad Trainer - Page 516
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aditya arora from Heritage Experiential Learning School, gurugram
Subject :NSO    Class : Class 6

Ans 1:

Charunainika A L from SILVER HILLS HSS, Kozhikkode
Class : Class 6
Also, d is right. Attraction is a sure test for magnetism. both b and d are right. Compromised?

Ans 2:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct answer is option B . A compass may be used to find East and west direction . Once you find North and South , by facing north , the right side will be East and left one will be West

Ans 3:

Abhiram Vedula from Deens Academy, Gunjur, Bangalore
Class : Class 6
both b and d are correct.

Ans 4:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 7
The answer could be B and D as both are correct

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

Ans 1:

Bertrand Calvin Fernando from Aqunias International School, mumbai
Class : Class 5

Ans 2:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
Please correct it

Ans 3:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 4:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
as per Wikipedia no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 5:

Siddhant Singhania from AGCS purulia, Puruliya
Class : Class 7

Ans 6:

Pratham Dave from GNS, Bangalore
Class : Class 7
2 and 4 is the answer to this question

Ans 7:

Suhana Kedia from Griffin's international school, Kharagpur
Class : Class 5
How is 1 correct? Please reply

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

Ans 1:

Fateh Singh Nanda from Gems modern academy, Dubai
Class : Class 6

Ans 2:

vayurve gowda from narayana group of schools, chennai
Class : Class 6
this question is wrong

Ans 3:

rajanya mandal from j h ambani, surat
Class : Class 4

Ans 4:

Ayushman from Adamas International School, Kolkata
Class : Class 6
Correct answer should be d because cerebellum is below cerebrum, located towards the back of the brain.

Ans 5:

Prashant MD from Ambassador School Dubai, Dubai
Class : Class 5

Ans 6:

Harsh Gupta from saint anslems pink city jaipur , Jaipur
Class : Class 5
Both A and C are correct

Ans 7:

Navya GUPTA from dps noida, Noida
Class : Class 3
This is absolutely correct as y is cerebrum and x is. EllThis Is absolutely correct as y is cerebrum X is cellebellum and Z is the Medulla ✅✅✅✅

Ans 8:

Pratham Dave from GNS, Bangalore
Class : Class 7
B is the answer to this question but it is showing A as correct option and it is showing B as correct option in the solutions.

Ans 9:

inaira heredia from Jamnabai narsee international school, MUMBAI
Class : Class 5
It says which option is incorrect not which one is correct

Ans 10:

PARUL GHARSE from Vibgyor, Mumbai
Class : Class 6
cerebrum is the largest part of the brain. cerebellum is the second largest part and it controls musculo-skeleton movement

Ans 11:

Pragun goel from Venkateshwar International School, Delhi
Class : Class 8
This question is correct

Ans 12:

Sonika from Delhi public school, Faridabad
Class : Class 7
THERE CHECKING IS WRONG AS ANSWER IS C

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Devansh from asn senior secondary school, delhi
Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

Mohi from Vibgyor, Bangalore
Class : Class 6
A

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PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Subject :NSO    Class : Class 6

Ans 1:

lavanya from sacred heart convent school, raikot road Barnala , Barnala
Class : Class 3

Ans 2:

Shriya Prakash from NPS International, Singapore
Class : Class 6
Although the explanation is correct, it does not match the answer

Ans 3:

Surya from INDIAN SCHOOL JALAN OMAN, Alkamil oman
Class : Class 7
they aren't giving the answer and the solution same in some papers

Ans 4:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4

Ans 5:

Arjun gupta from Dps noida , Noida
Class : Class 7
why arent they changing the answer

Ans 6:

Aarav Gupta from Cambridge International School, Jalandhar
Class : Class 6
The option selected here is wrong.

Ans 7:

SHIRIN BHATTACHARYYA from St. Joseph's Convent School, KHANDWA
Class : Class 10

Ans 8:

Dheeraj Thriyambak M from Sri Sankara Senior Secondary School Adyar, Chennai
Class : Class 6
NA

Ans 9:

Rachna Jo from HIS, BLR
Class : Class 6
correct option is C, not B. Please make correction.

Ans 10:

Pratheek from Null, Null
Class : Class 4
What is this? Answer and solution are completely different, they are not matching!

Ans 11:

ADRIJA SAHA from DPS RANIPUR, Haridwar
Class : Class 6
The answer does not match with the solution. There should be a change in the answer.

Ans 12:

Kaustav Bhowal from Julien Day School, Kolkata
Class : Class 10
clear objection

Ans 13:

Arsh from Lahs, Gwalior
Class : Class 3
ayush u are right!!!!!!!!!!!!!!!

Ans 14:

Shivani from DPS North school , Bangalore
Class : Class 7
There is no option only for the answer they had provided us with, gave the correct explanation but the need to correct the answer as well.

Ans 15:

Ashwak from Cambridge, Jalandhar
Class : Class 9
YES , their answer is not matching with their solution !!

Ans 16:

shrenik from anand niketan, Ahmedabad
Class : Class 9
yes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 17:

arpan bar from Future Bhubaneswar School, BHUBANESWAR
Class : Class 7

Ans 18:

arpan bar from Future Bhubaneswar School, BHUBANESWAR
Class : Class 7
Given correct answer and explanation do not match...please rectify...

Ans 19:

Shubhangi Pathak from Lilavatibai Podar High School, Mumbai
Class : Class 8
Pls rectify.

Ans 20:

Satwik Dixit from Christ Academy, Bangalore
Class : Class 7
Answer and solution are completely different, they are not matching!The solution is correct, but their ans is wrong

Ans 21:

Vikram from AVM, Mumbai
Class : Class 5

Ans 22:

Arnav Raj Sharma from The gulibilium school, Gurgaon
Class : Class 9
please explain. your solution doesn't match the correct answer provided by you.

Ans 23:

Shriya Prakash from NPS International, Singapore
Class : Class 6

Ans 24:

Ayan Gupta from sdf public school, GAUTAM BUDDHA NAGAR
Class : Class 9
The correct is NSN

Ans 25:

shrenik from anand niketan, Ahmedabad
Class : Class 9

Ans 26:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8
The ans is not matching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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EKLAVYA GONDULE from DPS BHILAI, Bhilai
Subject :NSO    Class : Class 6

Ans 1:

Lakshya Gupta from Manthan, Hyderabad
Class : Class 6

Ans 2:

Bhumi Chheda from SVKM J V Parekh International School, Mumbai
Class : Class 9
the answer is wrong

Ans 3:

Prajith Kumaran from RCIS, Bangalore
Class : Class 7

Ans 4:

SOURADEEP SHARMILA MANDAL from KENDRIYA VIDYALAYA IISC, Bengaluru
Class : Class 7
I THINK IT COMPLETES 25 OSCILLATIONS IN 5s

Ans 5:

kiyoshi from st xavier high school, Jaipur
Class : Class 6
The answer should be 0.2 s

Ans 6:

Angela M Dodmani from The jain International school, HUbli
Class : Class 7
The answer is wrong. It is 0.2

Ans 7:

aditya arora from Heritage Experiential Learning School, gurugram
Class : Class 8
According to definition - answer would be 0.2 s

Ans 8:

shashwat from vidyashram, jaipur
Class : Class 8
please explain the answer

Ans 9:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8

Ans 10:

Kaustav Bhowal from Julien Day School, Kolkata
Class : Class 10
the answer is wrong , it should be 0.2s. please kindly provide the solution to this question.

Ans 11:

Ritvik Nainawatee from Freedom International School, BANGALORE
Class : Class 6
The answer has to be 0.2 seconds(5/25). Pls correct

Ans 12:

shrawan azad from DPS VASANTKUNJ NEW DELHI, New Delhi
Class : Class 4
Answer is wrong

Ans 13:

Kaushik Bhattacharya from LVIS, NOIDA
Class : Class 7
The answer seems to be wrong. 5 seconds to complete 25 oscillations. That means for one oscillation it is 5/25 = 0.2 seconds. 'Period' usually means one complete oscillation that is 0.2 seconds and that is not given.

Ans 14:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
answer is wrong it should be 0.2 s

Ans 15:

Aritra Porey from DPS Bangalore North, Bengaluru
Class : Class 10
According to definition - answer would be 0.2 s

Ans 16:

PRISHA WAGH from G D SOMANI MEMORIAL SCHOOL, MUMBAI
Class : Class 7
wrong answer. should be 0.2s

Ans 17:

Anoop Haridas from dpsmis doha, doha
Class : Class 8
I think this answer is wrong. It should be 0.2 seconds, according to the definition of a Time Period in oscillatory motion.

Ans 18:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
The time taken to complete one oscillation - a left swing and a right swing - is called the time period (T); it is measured in seconds.A swing takes 5 seconds to complete 25 oscillations. That means it would take 1 second to complete 25 ÷ 5 = 5 oscillations. That also means it would take 1 ÷ 5 = 0.2 seconds to complete 1 oscillation.So, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 19:

Satwik Dixit from Christ Academy, Bangalore
Class : Class 7
The swing completes 25 oscillations in 5 seconds So, It will complete 1 oscillation in 5/25 seconds = 0.2 secondsSo, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

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ansh rai from delhi public school, Bhilai
Subject :NSO    Class : Class 5

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Anshuman D from MVM, Hyderabad
Subject :NSO    Class : Class 7

Ans 1:

Rithvik from BVM Global, Chennai
Class : Class 9
i checked in google. ans is a

Ans 2:

Krishna Srivastava from manipal public school, lucknow
Class : Class 7
Option B

Ans 3:

Himanish Basu from Army Public School Kamaraj Road, Bangalore
Class : Class 7

Ans 4:

Chaitanya L K from SKCHEC, bangalore
Class : Class 8
option b is the correct answer

Ans 5:

Tanushree from Asian International School, Colombo
Class : Class 7

Ans 6:

Shiven from Udgam, Ahmedabad
Class : Class 9

Ans 7:

priyanka from kendriya vidalaya kathmandu, JHAJJAR
Class : Class 8
option a

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Ajoy Bhuyan from DELHI PUBLIC SCHOOL, Bongaigaon
Subject :NSO    Class : Class 4

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Agastya Tripathi from dps gurgaon, Gurgaon
Subject :NSO    Class : Class 5

Ans 1:

CHIRAG KHORIA from EVERGREEN PUBLIC SCHOOL, MAYNAGURI
Class : Class 5

Ans 2:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5

Ans 3:

Mayank Singla from lfc, Sangrur
Class : Class 7

Ans 4:

samanvay sinha from School of India, Bangalore, bengaluru
Class : Class 5
It is a full moon and I had enough of your mistakes SOF now, I am going to beat you people.

Ans 5:

vayurve gowda from narayana group of schools, chennai
Class : Class 6
but how?

Ans 6:

Navya GUPTA from dps noida, Noida
Class : Class 3
C

Ans 7:

Pratham Dave from GNS, Bangalore
Class : Class 7
It is showing C as the answer to this question

Ans 8:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8

Ans 9:

Devaansh Peddu from LHGS, RAJAHMUNDRY
Class : Class 5
The answer is b not c

Ans 10:

SAARTH KARKERA from JBCN International School, Parel, Mumbai
Class : Class 5
This is absolutely incorrect. SOF should verify such answers. The question is about the phase of the moon. Even if it is a lunar eclipse it falls on a full moon day. The answer is B

Ans 11:

Shaurya Gote from KV BSF Dantiwada, S K Nagar
Class : Class 5
IT SHOULD NOT BE C! B IS THE RIGHT ANSWER. IF SUN EARTH MOON= FULL MOON. IF SUN MOON EARTH = NEW MOON. .

Ans 12:

Divit Srivastava from NPS , Bangalore
Class : Class 4
b is answer

Ans 13:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8

Ans 14:

CHIRAG KHORIA from EVERGREEN PUBLIC SCHOOL, MAYNAGURI
Class : Class 5
This is wrong i thinkThe answer should be C

Ans 15:

PARUL GHARSE from Vibgyor, Mumbai
Class : Class 6
how is this possible

Ans 16:

from kalyan, Kalyan
Class : Class 6
Moon will get no sunlight.THIS ISN’T POSSIBLE!!!!!

Ans 17:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8
It will cause full moon ???

Ans 18:

Advay from vibgyor high, pune
Class : Class 6
Yes!I checked it on Google!IT IS FULL MOON!!!!!!????

Ans 19:

Debashree Samanta from DPS BANGALORE , bangalore
Class : Class 6
if the answer is c, then they would have mentioned that it is a lunar eclipse. so it should be b

Ans 20:

nandini badola from christ school, dehradoon
Class : Class 6
moon does not have its own light it reflects of sun and as it is completely blocked by earth the suns light does not reflect and we do not see any phase of the moon .hence ans is c

Ans 21:

Ayushmaan from D, B
Class : Class 5
Full moon occurs when light is spread all over the surface of the moon...but in the picture the moon is blocked by earth and the moon will remain dark.Hence,the answer is (c) new moon

Ans 22:

Shaurya Gote from KV BSF Dantiwada, S K Nagar
Class : Class 5
THE MOON IS NOT STRAIGHT TO THE EARTH. MOON HAS SLIGHT SLANTING REVOLUTION. THAT IS WHY WE HAVE DIFFERENT PHASES OF THE MOON. IF THE MOON IS AT THE POSITION OF..... SUN---EARTH---MOON.......SO THAT WILL BE FULL MOON. FULL MOON IS GIVENN AT OPTION B. SO MOST OF US LIKE ME DID B BUT IT IS SHOWING C AS THE CORRECT ANSWER. BUT AS I THINK THAT EVERYTHING HAS A REASON.1. THE SOLUTION IS THE MEANINGFUL WAY IT IS GOOD. BUT IF YOU OPPOSE THIS, SO 2. THAT THE CHART IS SHOWING THAT....... SUN-----EARTH-----MOON. SO ACCORDING TO THE CHART, IT IS A LUNAR ECLIPSE IN WHICH THE MOON IS COMPLETLY BLACK. SO OPTION C HAS A REASON. SHARE YOUR IDEAS ALSO.

Ans 23:

rajanya mandal from j h ambani, surat
Class : Class 4

Ans 24:

Ayushman narayan from Dps ecity, Bangalore
Class : Class 5
According to any phases of the moon diagram, a full moon will be behind the Earth. Even lunar eclipse will be on a full moon day . New moons position will be the opposite of a full moon,i.e. between the earth and sun

Ans 25:

Ashwak from Cambridge, Jalandhar
Class : Class 9
How come it is C ? This is insane!!!

Ans 26:

Anvi Ranade from ,
Class : Class 1
I think that c is correct as the moon is behind the earth , so there will be no light reaching the moon . Thus, it will be new moon .

Ans 27:

Mathamagician from BGSNPS, Bengaluru
Class : Class 6
b) IT SHD BE FULLLLLLLLLLLLLL MOOOOOOOOOOOOOON!?!??!

Ans 28:

ram from vibgyor, pune
Class : Class 5
it is b

Ans 29:

Atul Sanjeev from Indian School Al Ghubra, Muscat
Class : Class 9
c

Ans 30:

Aditya from Sishugriha, Bangalore
Class : Class 4
only c

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