National Science Olympiad Forum By SOF Olympiad Trainer - Page 502
  1. Home
  2. /  Forum

User Forum

Ask Your Question
SHAUNAK from St Xaviers School, HAZARIBAG
Subject :NSO    Class : Class 3

Ans 1:

Sarthak Shome from Harvest International, Bangalore
Class : Class 8

Ans 2:

Avighna Shastri from doha modern indian school, doha
Class : Class 2

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
D

Ans 4:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

Ans 5:

Shrihan Raul from GIIS SINGAPORE, Singapore
Class : Class 6

Post Your Answer

Karangat house from Navy Children School, Payyannur
Subject :NSO    Class : Class 3

Post Your Answer

Devansh trehan from Blue bells international school , New delhi
Subject :NSO    Class : Class 3

Ans 1:

Eshan Ghosh from Don Dosco, Berhampore
Class : Class 3

Ans 2:

Kanak goel from Ursuline senior secondary convent school, Greater Noida
Class : Class 6
Heart

Ans 3:

Gurram Srisanthan from St Patricks Academy, Bengaluru
Class : Class 3
i think brain n spinal cord are parts of nervous system whereas kidneys n lungs are part of excretory system,through lungs we inhale o2 n exhale co2,kidneys excrete urines

Ans 4:

saisavit from sri kumaran ps, bangalore
Class : Class 8
D because spinal cord helps brain to control the body.

Ans 5:

ANKIT from devin-national school, bangalore
Class : Class 5
the spi

Ans 6:

Riddhima Vashist from Podar International School, Mumbai
Class : Class 3

Ans 7:

Riddhima Vashist from Podar International School, Mumbai
Class : Class 3
Heart is the correct answer

Ans 8:

Avyukta Saraswat from St Francis School , Greater noida west
Class : Class 3
I think both kidneys and hearth are correct. beacause lungs are in respiratory,curculatory and excretory system as they help us to brathe ,make pure blood and also the blood goes from hearth then lungs and then all parts. Plese tell how hearth is wrone.

Ans 9:

Sanskriti Ranjan from SETH ANANDRAM JAIPURIA SCHOOL, Ghaziabad
Class : Class 6
lungs and spinal cords are part of nervous system so lungs and kidney are part of excretory system(lungs dispose co2 from body)

Ans 10:

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

Ans 11:

Suhani Chauhan from Sai international School, bhubaneswar, Bhubaneswar
Class : Class 6
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 12:

SIDDHARTH SOMANI from Vibgyor High, Mumbai
Class : Class 5
Answer is D because both lungs n kidney are in Exetery system

Ans 13:

Advik Daga from Global Edge School, Hyderabad
Class : Class 4
It will be kidney because lungs give out carbon dioxide as waste.Heart is the wrong answer........

Ans 14:

Twisha Khurana from First steps IB World school , Chandigarh
Class : Class 5
I think it should be heart not kidney

Ans 15:

Avyukta Saraswat from St Francis School , Greater noida west
Class : Class 3
I think option a is also correct with option d as lungs are in curcularury system system too as the blood first goes to the lungs after the heath and then the body. Lungs also filter air and help us breathe so they are in excretory and resperatory system too. Plese tell how option a hearth is wrong .

Ans 16:

ANKIT from devin-national school, bangalore
Class : Class 5
spinal cord connects every organ to brain an

Ans 17:

Purva Kulkarni from Podar International School ICSE Kalyan, Dombivali east
Class : Class 8
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 18:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5

Post Your Answer

Ujjwal Upadhyay from Navy Children school, Vasco
Subject :NSO    Class : Class 5

Ans 1:

Dripto Chakraborty from Greenwood High Sajarpur, Bangalore
Class : Class 5
You can earn badges by studying hard in sof , like doing tests, previous year papers, mock tests, etc.

Ans 2:

Lohithakshith Pati from Olive international school , qatar
Class : Class 8
use your brain bro

Post Your Answer

samyak shwet from kidzee, Begusarai
Subject :NSO    Class : Class 8

Post Your Answer

Pratyay Sarkar from South Point High School, Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Sanket Kulkarni from Euroschool, Pune
Class : Class 8
Please explain your answer. I am really confused.@UTKARSH SAWARN

Ans 2:

UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Class : Class 8
IN MY OPINION OPTION C IS THE CORRECT ANSWER

Post Your Answer

Pratyay Sarkar from South Point High School, Kolkata
Subject :NSO    Class : Class 7

Ans 1:

Prisha Hemchandra Lokhande from NPS Whitefield, Bangalore, Bangalore
Class : Class 8

Ans 2:

Bhagyesh Kamal from DPS, Mumbai
Class : Class 8
how to do it

Ans 3:

PRIYANSHU DEB from New Green Field School, Saket, New Delhi
Class : Class 7

Ans 4:

Vedang Shridhar Sasturkar from Vasant Valley School, New Delhi
Class : Class 7
I don't understand tbh

Ans 5:

kartick Somasundaram from san academy, chennai
Class : Class 1

Ans 6:

kartick Somasundaram from san academy, chennai
Class : Class 1
@Bhagyesh You need to use your

Ans 7:

Bhim Maity from ASIAN INTERNATIONAL SCHOOL HOWRAH, HOWRAH
Class : Class 7

Ans 8:

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

Ans 9:

Raavi from DPS, Ranchi
Class : Class 8
@bhagyesh .As metal rod or electroscope is positively charged all the currents flown to the object will be positive and the leaves will repel each other

Ans 10:

sachinthite@rocketmail.com from Sinhghad Public School Korti, Pandharpur
Class : Class 4
how priyanka

Ans 11:

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

Ans 12:

PRIYANSHU DEB from New Green Field School, Saket, New Delhi
Class : Class 7

Ans 13:

Arjun from Sri Kumaran Public School - ICSE, Bengaluru
Class : Class 8
This is wrong. The answer should be C, due to induction. The positive charges move to the bottom as they repel, while the negative particles should move to the top, as they are attracted to the positive particles in the bar.

Ans 14:

PRIYANSHU DEB from New Green Field School, Saket, New Delhi
Class : Class 7
why not option c?

Ans 15:

kartick Somasundaram from san academy, chennai
Class : Class 1
@Bhagyesh You need to use your brain and do it with your hands. Simple. @Raavi no need of that big thingy

Post Your Answer

Pratyay Sarkar from South Point High School, Kolkata
Subject :NSO    Class : Class 7

Post Your Answer

Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 6

Ans 1:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
they use both so the answer is d

Ans 2:

Sharmi Chowdhury from G.D Birla Centre For Education , Kolkata
Class : Class 7
Don't loudspeakers use electromagnets?

Ans 3:

Aarush Mallya from EISB, BANGALORE
Class : Class 5
Loud speakers use permanent magnets

Ans 4:

Smita De from Bishop Cotton Girls School, BANGALORE
Class : Class 6
answer is B so obvious

Ans 5:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Loudspeakers use electromagnets.

Ans 6:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9

Ans 7:

satwik patnaik from DPS Rourkela, Rourkela
Class : Class 7
answer should be b

Ans 8:

Veda Dua from Delhi Public School, R. K. Puram, New Delhi
Class : Class 10
Loudspeakers use electromagnets, so the answer is option B

Ans 9:

Shreya Yegna Narayanan from psbb, chennai
Class : Class 6
Loud speakers use electromagnets as they dont need magnetic force when not in use so ans is B

Ans 10:

Tamrashi Pani from National Public School, Bangalore
Class : Class 8
But all of them use permanent magnets...so D is correct

Ans 11:

Mridul Jain from Shishukunj International School Indore, Indore
Class : Class 9
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 12:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 13:

NISHTHA GUPTA from DPS R K Puram, newdelhi
Class : Class 10
answer will be b as loudspeakers use electromagents

Ans 14:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Loudspeakers use electromagnets so it should be answer b

Ans 15:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10

Ans 16:

Joe Bipin from National Public School Agra, Bangalore
Class : Class 10
loud speakers have both electromagnets and permanent magnets

Post Your Answer

Gauri Singh from St Johns School Marhauli, Varanasi
Subject :NSO    Class : Class 6

Ans 1:

arjun from the bishops school camp , pune
Class : Class 8

Ans 2:

Syed Mukhtar Ahmed from Mayoor Private School, Abu Dhabi
Class : Class 6

Ans 3:

rocker harshil from TImpany senior secondary school, Visakhapatnam
Class : Class 6
as only the option (D) will be magnetic and the SOFT IRON will act as a keepers

Post Your Answer