National Science Olympiad Forum By SOF Olympiad Trainer - Page 462
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IAMLOST from ABC, Pune
Subject :NSO    Class : Class 4

Ans 1:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
To SOF New Delhi and Master answer Revisewise Noida I hope you are ready to answer my question once again after you gave different answers in the workbook and the website and I got more than 100 likes for that question and the master answer wasn't giving the answer. So read what I have typed below.Please answer: How does "drilling a hole into a metal sheet" cause friction? Please answer as soon as possible (ASAP).From Ashmi Narkar Grade 4SOF Student Vibgyor High Airoli

Ans 2:

Lamjingrenba Kshetrimayum from Kulachi Hansaraj Model School, North Delhi
Class : Class 4
To Ashmi Narkar-Drilling a hole into a metal sheet cause friction as,because of the friction it is able to drill in the metal sheet and make a hole in it!I hope this helped you!

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
My sister also says that she had same question just the name was different and she gave same answer and that time too answer was wrong. Now tell me the answer until 19.11.2019

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Ritabrata Das from OPJS, Angul
Subject :NSO    Class : Class 6

Ans 1:

Anushka Wasnik from DPS, nagpur
Class : Class 8

Ans 2:

Aarush Patil from St.Arnold's, pune
Class : Class 1

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Hey, the answer is C only. Because in burning of candle both melting and burning of wax is included right? Ya, so melting of wax is physical change (wax is still wax) and burning of wax is chemical change (wax turns to smoke). And both of these are irreversible. Now see an example. During Diwali we light tea lights, those small, circular candles, right? Have you ever observed it? First the wax melts into liquid wax, then if you don't blow the flame away, the wax burns away! These are CANDLES after all right? So this is how burning of candle is physical, chemical and irreversible change. This answer is written WITHOUT use of any website. Plz consider this as solution. SOF if you could add this as solution could you do that?

Ans 4:

Lakshmi from FPS, Bangalore
Class : Class 10
it is not C because burning of candle is reversible. I think answer is B

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armaan from bhavan, amritsar
Subject :NSO    Class : Class 5
nso

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Pavan from Kendriya Vidalaya DRDO, Bengaluru
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

hi nandika, how can we help you? as this forum is designed to solve SOF Olympiad related questions/queries, so use this platform to clear your doubts about these topics.

thanks

happy learning.


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Shaurya Veer from Army Public School ASC C and C , Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
What IS THIS????????????????

Ans 2:

Siddhesh from Indian School Al Wadi Al Kabir, Muscat
Class : Class 7
Diagram is missing in the question

Ans 3:

Navya from Gyanshree, Noida
Class : Class 6
Yes, there is no diagram

Ans 4:

Jeisree kk from K.S.N secondary school , Chennai
Class : Class 7
No diagram = No answer as I don't know what's the diagram

Ans 5:

Kanishk Rahul Shabadi from Elpro International school, Pune
Class : Class 6
there is no diagram

Ans 6:

Vedashri Raja from NPS INR, Bengaluru
Class : Class 6

Ans 7:

Anika from Vibgyor High Electronic City, Bangalore
Class : Class 7

Ans 8:

Yukta Jalasutram from Sunrise International School Abu Dhabi, Abu Dhabi
Class : Class 5
No diagrammm???

Ans 9:

Aaradhay Awasthi from Dps Vasant Kunj, Delhi
Class : Class 7
I knew that this has a glitch so I reported an error for this question

Ans 10:

Ishanvi Bikram from delhi public school, bokaro steel city
Class : Class 6
There is no diagram?

Ans 11:

JAYANTA BISWAS from APS Ranchi, RANCHI
Class : Class 5
No diagram in question

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ABHIRAM from chirec, HYDERABAD
Subject :NSO    Class : Class 7

Ans 1:

P Eswar Sattwic from Sancta Maria International School, Hyderabad
Class : Class 5
answer is option a

Ans 2:

Tanushree from Asian International School, Colombo
Class : Class 7
The answer is A right?🤔🤔

Ans 3:

Sherlock Holmes from Baker Street, London
Class : Class 9
The answer is A - Bacterium, Bacillus anthracis.

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SHRADHA MOHAPATRA from APEEJAY SCHOOL, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Saanvi Prasad from DPS Noida, Noida
Class : Class 5
My answer is B

Ans 2:

Samanyu from NPSI, Singapore
Class : Class 5

Ans 3:

Samanyu from NPSI, Singapore
Class : Class 5
how is digestion involuntary?!

Ans 4:

Akshat Gajera from Widsom World school,Wakad, Pune
Class : Class 5
Ans-B

Ans 5:

Tarun V from National public school, Bangalore
Class : Class 5

Ans 6:

Amaya Prabhu Bhadoria from TSRS Aravali , Gurugram
Class : Class 4

Ans 7:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3

Ans 8:

SHRADHA MOHAPATRA from APEEJAY SCHOOL, New Delhi
Class : Class 5

Ans 9:

Samanyu from NPSI, Singapore
Class : Class 5

Ans 10:

sushanthan from null, null
Class : Class 7

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Rishit Garg from Bhavan s B P Vidya Mandir , Nagpur
Subject :NSO    Class : Class 5

Ans 1:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Globallllllllllllllll warminggggggggg

Ans 2:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
nitrogen and sulphur are not greenhouse gases so NOT global warming

Ans 3:

Saransh Singhania from Vidya Mandir estancia, Chennai
Class : Class 8
cccccccccc

Ans 4:

Ankush Negi from Dehradun world school, Dehradun
Class : Class 7
Global warming

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Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Subject :NSO    Class : Class 6

Ans 1:

Shreeya Mangla from ASN Senior Secondary School, New Delhi
Class : Class 9

Ans 2:

Dushyant Singh from Shree Ram Centenial School, Indore
Class : Class 9

Ans 3:

Mukta Pundir from ,
Class : Class 7

Ans 4:

Ayan Vohra from Bhavan Vidyalaya , Chandigarh, chandigarh
Class : Class 8
umm............ SOF where is my solution?

Ans 5:

Sai Trinayanee from NPS, Chennai
Class : Class 6
Vedang Amonkar your answer is same as the solution

Ans 6:

Ronaldo from Dps, New Delhi
Class : Class 7
Yes it is kwakshiorkor

Ans 7:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6
P is protein, Q is fat, R is carbohydrate and S is vitamin C. Deficiency of proteins causes kwashiorkor whereas marasmus is caused by deficiency of proteins along with carbohydrate. Marasmus occurs in children usually in infants below the age of 1 year and kwashiorkor occurs in children.

Ans 8:

saikrishna from bharatiya vidhya bhavans public school, Hyderabad
Class : Class 9

Ans 9:

SOUMYA SHAMBHAVI JHA from PODAR INTERNATIONAL SCHOOL, MUMBAI
Class : Class 6
Vedang your answer is in the solution

Ans 10:

Kushagra Chaturvedi from Podar International School Chinchwad, Pune
Class : Class 7

Ans 11:

Vedang Amonkar from Dr K B Hedgewar High School, Panaji
Class : Class 6
hey????!!!! Oh.......... Umm its me only.

Ans 12:

saikrishna from bharatiya vidhya bhavans public school, Hyderabad
Class : Class 9

Ans 13:

Sai Trinayanee from NPS, Chennai
Class : Class 6
Good explanation

Ans 14:

Raksheet Shah from Swami Vivekanad International School, Mumbai
Class : Class 8

Ans 15:

Aarna Singh from Delhi Public School, Etawah
Class : Class 6
Answer should be B.

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Saiesh from Sindhi high school, Bangalore
Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

Naitik from Delhi Public School Noida, Noida
Class : Class 4

Ans 3:

SAI KRISHNA from SHISHYA BEML PUBLIC SCHOOL, BANGALORE
Class : Class 3

Ans 4:

SAI KRISHNA from SHISHYA BEML PUBLIC SCHOOL, BANGALORE
Class : Class 3
the correct answer is a

Ans 5:

Saksham Arora from DPS, Gurugram 102
Class : Class 9
a

Ans 6:

Rishan Sandeep Gadhia from Orchids International, Mumbai
Class : Class 8
yes, the answer will be (a) as when we take such a leaf only the green part will be containing starch as it has chlorophyll in it and the other part does not , this is why only the green part will have the ingredients to make glucose(starch)and once iodine is added it turns blue and black

Ans 7:

Devanshi from Dps, Hyderabad
Class : Class 4
Answer is A

Ans 8:

A Venkata Sai Pranav from Podar International School, Bhusawal
Class : Class 9
answer is A

Ans 9:

Chinmayee from Dimensions , Singapore
Class : Class 4
I mean D, and I think it is D : )

Ans 10:

Shreshta from Presidium, Ghaziabad
Class : Class 3
I think the answer is [A]

Ans 11:

Ishrita Rai from Sanskriti, pune
Class : Class 8
THE CORRECT ANSWER IS (A)

Ans 12:

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

Ans 13:

Chinmayee from Dimensions , Singapore
Class : Class 4
The correct answer is D

Ans 14:

Rudransh Shukla from Delhi Public School, Chandigarh
Class : Class 5

Ans 15:

Khanak Jha from Prime Academy, Mumbai
Class : Class 4
AAAAAAAAAAAAAis the answer

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