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UTKARSH SAWARN from AIR FORCE SCHAOOL AMBALA CANTT, AMBALA CANTT
Subject :NSO    Class : Class 7

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

Ans 1:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8
What a tricky question!

Ans 2:

Ridhika from St Xavier sr sec school, Bathinda
Class : Class 3
D

Ans 3:

Ashwak from Cambridge, Jalandhar
Class : Class 9
The correct answer is D

Ans 4:

Avinabha Hore from DPS south kolkata, Kolkata
Class : Class 5
It is very tricky question.

Ans 5:

saisavit from sri kumaran ps, bangalore
Class : Class 8
very tricky

Ans 6:

Nirvi Pal from jasudben ML School, mumbai
Class : Class 5
it is a piece of cake

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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:

Shrihan Raul from GIIS SINGAPORE, Singapore
Class : Class 6

Ans 4:

Ashwak from Cambridge, Jalandhar
Class : Class 9
D

Ans 5:

Aditri Dixit from TCIS, Bangalore
Class : Class 3

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

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

Ans 1:

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

Ans 2:

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

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:

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

Ans 5:

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

Ans 6:

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 7:

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 8:

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

Ans 9:

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 10:

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

Ans 11:

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

Ans 12:

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

Ans 13:

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 14:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5

Ans 15:

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 16:

Eshan Ghosh from Don Dosco, Berhampore
Class : Class 3

Ans 17:

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 18:

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

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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

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

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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

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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:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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 8:

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

Ans 9:

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

Ans 10:

kartick Somasundaram from san academy, chennai
Class : Class 1

Ans 11:

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

Ans 12:

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

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:

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

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

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