National Science Olympiad Forum By SOF Olympiad Trainer - Page 487
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aditya arora from Heritage Experiential Learning School, gurugram
Subject :NSO    Class : Class 6

Ans 1:

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

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:

Shreyasi Padihary from The Cambridge International School , Bangalore
Class : Class 6
The answer could be B and D as both are correct

Ans 4:

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?

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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:

Siddhant Singhania from AGCS purulia, Puruliya
Class : Class 7

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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 7:

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

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

Study the given passage.
X, Y and Z are different parts of the brain. X controls musculo-skeletal movement, Y controls learning ability and memory and Z controls activities such as breathing, heartbeat and blood circulation. Identify X, Y and Z and select the incorrect statement regarding them.

AX is the largest part of the brain whereas Z connects the brain to spinal cord.
BY is the upper part of brain also controls our sense organs.
CZ is also called brain stem and it works even when we are asleep.
DX is located below Y towards the back of the brain.


Ans 1:

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 2:

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

Ans 3:

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

Ans 4:

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 5:

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

Ans 6:

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 7:

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

Ans 8:

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

Ans 9:

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 10:

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

Ans 11:

Fateh Singh Nanda from Gems modern academy, Dubai
Class : Class 5

Ans 12:

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

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

Which of the following holds true for water transport?
1. It provides door to door service.
2. Perishable goods like milk, fruits and vegetables are quickly carried by it.
3. It is very useful for transporting heavy and bulky goods.
4. It is a better mode of transportation for petroleum and its products as it involves crosscontinental transfers.
5. It is very useful at the time of natural or any other calamities for saving people or supplying goods of their basic requirements immediately.

A 3 and 4
B 1, 2 and 5
C 2, 3 and 4
D 4 and 5

Ans 1:

Mohi from Vibgyor, Bangalore
Class : Class 6
A

Ans 2:

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

Post Your Answer

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

Ans 1:

shrenik from anand niketan, Ahmedabad
Class : Class 9

Ans 2:

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

Ans 3:

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

Ans 4:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4

Ans 5:

Shriya Prakash from NPS International, Singapore
Class : Class 6

Ans 6:

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

Ans 7:

Satwik Dixit from Vibgyor High, Bangalore
Class : Class 6
Answer and solution are completely different, they are not matching!The solution is correct, but their ans is wrong

Ans 8:

Shivani from DPS North school , Bangalore
Class : Class 6
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 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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 13:

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

Ans 14:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
please explain. your solution doesn't match the correct answer provided by you.

Ans 15:

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

Ans 16:

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

Ans 17:

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 18:

Vikram from AVM, Mumbai
Class : Class 5

Ans 19:

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

Ans 20:

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

Ans 21:

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

Ans 22:

Aarav Gupta from Cambridge International School, Jalandhar
Class : Class 5
The option selected here is wrong.

Ans 23:

Shubhangi Pathak from Lilavatibai Podar High School, Mumbai
Class : Class 7
Pls rectify.

Ans 24:

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

Ans 25:

Ayan Gupta from sdf public school, GAUTAM BUDDHA NAGAR
Class : Class 6
The correct is NSN

Ans 26:

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

Post Your Answer

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

Ans 1:

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 2:

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

Ans 3:

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

Ans 4:

Prajith Kumaran from RCIS, Bangalore
Class : Class 7

Ans 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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 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:

Lakshya Gupta from Manthan, Hyderabad
Class : Class 6

Ans 15:

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

Ans 16:

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

Ans 17:

Satwik Dixit from Vibgyor High, Bangalore
Class : Class 6
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.

Ans 18:

Subhang Deep Sahu from Chrysalis High Kadugodi . , Bangalore
Class : Class 7

Ans 19:

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.

Post Your Answer

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

Shiven from Udgam, Ahmedabad
Class : Class 9

Ans 5:

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

Ans 6:

Tanushree from Asian International School, Colombo
Class : Class 7

Ans 7:

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

Post Your Answer

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

Post Your Answer

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

Ans 1:

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

Ans 2:

UMANG from SPRING DALE COLLAGE, Lucknow
Class : Class 8

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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 7:

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 8:

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

Ans 9:

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

Ans 10:

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

Ans 11:

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

Ans 12:

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

Ans 13: