National Science Olympiad Forum By SOF Olympiad Trainer - Page 769
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Nishant Doshi from new era senior secondary school nizampura vadodara, Vadodara
Subject :NSO    Class : Class 5

Ans 1:

Vyapti Rawat from ST MARY, NEW DELHI
Class : Class 6
ans is d

Ans 2:

Shreyansh from Hariyana Vidya Mandir, Kolkata
Class : Class 8
Correct option is D because mineral deposits are found on the crust of the Earth

Ans 3:

Sara Kapoor from Manav Rachna International School charmwood, Faridabad
Class : Class 7
a c d are correct

Ans 4:

Arav Singh from Jyoti Niketan School, Azamgarh
Class : Class 6
ans d

Ans 5:

Dibyajyoti Das from DAV PUBLIC SCHOOL, Bhubaneswar
Class : Class 5
D

Ans 6:

aditya parlewar from St. Xaviers High school , Nagpur
Class : Class 3
you fools i found the correct answer d

Ans 7:

aarav shankar from st xaviers high school, gurugram
Class : Class 8
No, the inner core is actually made up of iron and nickel.

Ans 8:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
D drives me crazy

Ans 9:

Sanskriti Nagar from Rose Bud Academy, khagaria
Class : Class 5
answer is D

Ans 10:

Mannan from Sherwood High, Bengaluru
Class : Class 7
sof is dumb nearly all answers are given wrong

Ans 11:

VISHNU from NARAYANA OLYMPIAD GOPALAPURAM, chennai
Class : Class 5
they give two answer correct and but one of the two are the right answers

Ans 12:

from GIIS,
Class : Class 4
Answer is = D

Ans 13:

Bhavya from ABC, Delhi
Class : Class 7
ANSWER IS 'D'

Ans 14:

Arnesh from DPS Mathura Road , New Delhi
Class : Class 7
d correct ans

Ans 15:

Apurv from Delhi Public School , Ambala
Class : Class 1

Ans 16:

Ayan from Oakridge International School, Bangalore
Class : Class 5
ans is d

Ans 17:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
you are correct it doesnt update it self every year

Ans 18:

Arav Singh from Jyoti Niketan School, Azamgarh
Class : Class 6

Ans 19:

hritika from DAV public , Bihar Sharif
Class : Class 4
The answer is {D}

Ans 20:

Sayan Duary from Vidyasagar Shishu Niketan, Paschim Medinipur
Class : Class 8
A and D. are the correct answer

Ans 21:

Biju Pappachan from Rkc , Raipur
Class : Class 1
I do not think that all answers and words of synopsis is correct

Ans 22: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 23:

Kashyap Shankar from NPS, Singapore
Class : Class 6
D

Ans 24:

SAMARTH GOYAL from DPS SANGRUR, SANGRUR
Class : Class 6
answer is d because core is innermost layer of earth so it could be made up of nicel and iron

Ans 25:

Dibyajyoti Das from DAV PUBLIC SCHOOL, Bhubaneswar
Class : Class 5
D

Ans 26:

Swastik Srivastava from Baldwin Boys High School, Bangalore
Class : Class 5
no c is correct ans

Ans 27:

DHERA from SBC ACADEMY , Dindigul
Class : Class 7
The answer is D

Ans 28:

SHUBHANI LAKHERA from ANN MARY SCHOOL, Dehradun
Class : Class 5
P is made up of iron so a is wrong

Ans 29:

Ruhaan Singh from Gopalan International School, Bangalore
Class : Class 7
D

Ans 30:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
you all are mads. D , A are correct options

Ans 31:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
P is the molten part made up of nickel and iron(p is not molten). R is the hottest part of Earth which is solid( P is the hottest part of Earth which is solid).Q is connected to surface with the help of volcanoes( R actually has magma in it ). Minerals and oil deposits are found in the part S. and option D is only corect

Ans 32:

Advait kaushik from Ryan international school, Gurugram
Class : Class 8
Class:Class:Class:VERY HARD

Post Your Answer

Kushagra Shukla from Presidium dwarka, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 2:

Dhyana from Anand Vidhya Vihar, Vadodara
Class : Class 7
The answer should be B.

Ans 3:

ESWAR RAMAGOPAL REDDY SABBELLA from SENTIA THE GLOBAL SCHOOL, HYDERABAD
Class : Class 6
I think the answer should be b as after a forest gets destroyed by a forest fire ,new trees will grow as the remain of the trees will decompose and make the sol fertile.

Ans 4:

Saani from Cambridge School, Mangalore
Class : Class 9

Ans 5:

Shreyansh Gupta from MVN, faridabad
Class : Class 7
the answer is B.

Ans 6:

MAYANK SAH from DPS KALALI VADODARA, VADODARA
Class : Class 7
i think the answer should be B because the statement 'New trees will grow quickly to replace the burnt ones as the ash of the burnt trees will make the soil more fertile' is also true

Ans 7:

Sanskriti Nagar from Rose Bud Academy, khagaria
Class : Class 5
The correct answer is Bthis time I think SOF is wrong

Ans 8:

ISHAN CHAUDHARY from DELHI PUBLIC SCHOOL, KORBA
Class : Class 5
The question and choices given are a bit tricky. The correct answer is A because the language of (iv) is deceptive and says "new trees will grow quickly to replace the burnt ones". You have to understand that "new trees" won't grow quickly, you can only sow small plants not trees.

Ans 9:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
a is correct because there willbe soil erosion without trees

Ans 10:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
I agree ,B is the correct answer

Ans 11:

Aishee Sarkar from St. Stephens School , Kolkata , West Bengal, Kolkata
Class : Class 4
I think B is the correct answer

Ans 12:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Ash is an organic matter so the answer should be B

Ans 13:

Harsh Sobti from the samhita academy, BLR
Class : Class 5

Ans 14:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM
Class : Class 7
Harry?! What a fake! Harr potter is an adult!

Ans 15:

Yajat Manoj from Vibgyor, Bengaluru
Class : Class 5
BBBBBBBBBBBBBBBBBB IT IS THE CORRECT ANSWER I AGREE WITH THE OTHERS

Ans 16:

rishi karthik from Bvm Global, chennai
Class : Class 5
It is certainly B as ashes of any organic matter makes soil fertile.

Ans 17:

NeilRaphaelVeigas from Rockwell International School, Hyderabad
Class : Class 6
Come on Snigdha! The CORRECT ANSWER IS (B)! Ash makes soil fertile 'cause it's organic , dude! How will trees not grow?(P.S.- please don't think about Ash in Pokemon. Please, don't)🤦‍♂️🤦‍♂️

Ans 18:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5

Ans 19:

Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Class : Class 7
THe AntwerpThe answer is (A) because if forest fire occurs there will not be any trees and soil erosion can happen and All the ashes including soil may erode and then how can it make the soil fertile

Ans 20:

ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Class : Class 8
B IS THE CORRECT ANSWER AS BURNING OF WASTE CROPS AFTER HARVESTING OF GRAINS IS STANDARD METHOD OF INCREASING SOIL FERTILITY

Ans 21:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
I think B is correct option as ash acts as a fertilizer for plants (even if in small quantities). Master Answer (Admin, Revisewise) EXPLAIN the answer to all of us.

Ans 22:

Sohan Choudhury from Delhi Public School Electronic City Bengaluru, Bengaluru
Class : Class 6
i think it should be B..as ash acts as a fertilizer.

Ans 23:

Saloni Saini from JPHS, Jaipur
Class : Class 6
B should be the correct answer

Ans 24:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
B is the answer!

Ans 25:

Siddharth Laxmisha from The Study Lecole Internationale, PUDUCHERRY
Class : Class 8
WHAT! B is correct, not A. The answer is B, NOT A!

Ans 26:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5
How ??? It should be b.As ash is an organic matter. the process of nitrogen fixation will make the soil fertile . Please tell .Why????

Ans 27:

Jayaditya singh from Delhi Public School, gurgaon
Class : Class 9
Actually, forest fires lower the level of nitrogen in the soil. Since nitrogen quantities in the soil is extremely important for plant growth, lowered level of nitrogen is a big barrier in plant growth

Ans 28:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
SOF is giving wrong answers ! Does it ever thinks that by reading wrong things , we can get lesser marks in our exams ?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Ans 29:

DAIVIK AMBATI from Kendriya Vidyalaya, Dharwad, Dharwad
Class : Class 9
I think the answer is B

Ans 30:

Ayush Pal from GD Goenka Public School Dakshineswar, West Bengal, India, Kolkata
Class : Class 8
Answer must be B as it is organic and increases soil fertility.

Ans 31:

Ashwak from Cambridge, Jalandhar
Class : Class 9
Answer is B as ash is an organic

Ans 32:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
B B B B B B . B B B B B B BB BB B B B B B . IS THE ANSWER

Ans 33: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 34:

harry potter from Hogwarts school of witchcraft and wizardry , london
Class : Class 5
yes B is the answer as the ash contains minerals from the other trees.. i agree that the process of nitrogen fixation will make the soil fertile.........

Ans 35:

Omar Faruq Molla from ITL Public School, Delhi
Class : Class 9
B is the correct answer

Ans 36:

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

Ans 37:

Tanmay Chaudhary from MIET public school, MEERUT
Class : Class 7
BBBB IS THE ANSWER

Ans 38:

Sumit Biswal from Dps gandhinagar, Gandhinagar
Class : Class 7
I agree with Ishan as trees cannot grow very quickly...But I did B at my first attempt

Post Your Answer

B LOHITH from CHRIST PUBLIC SCHOOL, Mysore
Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Post Your Answer

Kushagra Shukla from Presidium dwarka, New Delhi
Subject :NSO    Class : Class 5

Ans 1:

Adrija Acharya from DAV Model School , Durgapur, Durgapur
Class : Class 5
answer b

Ans 2:

Ankita Dharmani from Euroschool, Mumbai
Class : Class 8
Answer: C

Ans 3:

Debeesmita Lenka from DAV PUBLIC SCHOOL CHANDRASEKHARPUR, BHUBANESWAR
Class : Class 5
ANSWER-C

Ans 4:

somesh from Centre point katol road, Nagpur
Class : Class 6
C

Ans 5:

Ankita Dharmani from Euroschool, Mumbai
Class : Class 8
Answer: C

Ans 6:

Niveideeta Cour from Suncity World School, Gurgaon
Class : Class 5
Answer-C

Ans 7:

Adrija Pandey from SSRVM Bhugaon Pune, Pune
Class : Class 9

Post Your Answer

Aditya Prasad from Notre Dame , Gumla
Subject :NSO    Class : Class 9

Post Your Answer

Aditya Prasad from Notre Dame , Gumla
Subject :NSO    Class : Class 9

Post Your Answer

Aditya Prasad from Notre Dame , Gumla
Subject :NSO    Class : Class 9

Post Your Answer

AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

Ans 1:

from Gitanjali Public School ,
Class : Class 8
option d is the correct answer

Ans 2:

Rishit Verma from CMR NPS, Bengaluru
Class : Class 6
The answer is (c) Condition 1- There should be an area which includes all the shapes [options (b), (c) and (d) satisfy this condition] Condition 2- There should be an area which includes only the circle and triangle [only option (c) satisfies this condition] Therefore option (c) is correct

Post Your Answer

NIRMAY JOSEPH from St Columba's School, New Delhi , New Delhi
Subject :NSO    Class : Class 4

Ans 1:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
See this Refer to the solution

Ans 2:

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

Ans 3:

somesh from Centre point katol road, Nagpur
Class : Class 6
you cant lift a car by your hands but you can when you are far so you cant lift the stone when you are near but you can lift it when you are far

Ans 4:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
I DONT KNOW

Ans 5:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7
What is this?Well,the synponis does not say anything like this.How do you know?And Harry (Potter), I think you should really provide explanations when you say something like this.I think you don't provide explanations ever.

Ans 6:

Vibha from Birla Public School, Doha
Class : Class 7
THE ANSWER IS THE OPTION D

Ans 7:

Vansh from DPS noida, Noida
Class : Class 8
[url=http://ashematme.ru]ashematme.ru[/url]

Ans 8:

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

Ans 9:

Sanaya Singh from Hiranandani Foundation, Mumbai
Class : Class 2
It is D. Imagine it this way. There is a heavy rock on the seesaw and we sit closer to the middle. It will be hard for us to go down and rock up. But if we sit at the edge of the seesaw, we will go down and the seesaw will go up.

Ans 10:

Debarpan Das from Delhi Public School , Durgapur
Class : Class 9
option D

Ans 11:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
I agree option D

Ans 12:

RC from Vibgyor, Navi Mumbai
Class : Class 9
the answeer has been changed to D so please stop fighting especially Monica Sharma !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 13:

LAVANYA DADHWAL from BLOOM PUBLIC SCHOOL, South West Delhi
Class : Class 9
Not all things will be written in the synopsis you have to read something from the book also.D option is correct.

Ans 14:

Akshat Upadhyay from Greenwood High, Bangalore
Class : Class 9
I DONT UNDERSTAND WHY IS IT D

Ans 15:

Shuddhi Choubey from euro school mumbai, Mumbai
Class : Class 4
ans is d

Ans 16:

Arjun Gourineni from CHIREC International School, Hyderabad
Class : Class 7

Ans 17:

Ayush Singh from LMB, Kolkata
Class : Class 4

Ans 18:

somesh from Centre point katol road, Nagpur
Class : Class 6
It should be d not b

Post Your Answer

AKSHITA DIXIT from R K SARDA VIDYA MANDIR, RAIPUR
Subject :NSO    Class : Class 6

Ans 1:

Riya Gupta from Birla Divya Jyoti, Siliguri
Class : Class 8
I suppose that option'B' is the correct answer. If my thinkings are wrong, then please kindly make me understand with a reason i understand in simple words. If my answer is correct then please, please, please comment on it. My goal here is not to give long lectures, but to find the correct answer to this question.

Ans 2:

Maina from KIS, Pune
Class : Class 7
Why C is incorrect answer? During Summer month at noon there will be shadow exactly under feet.

Ans 3:

Anika Saha from New Town School, KOLKATA
Class : Class 6
The answer should be C.

Ans 4:

Debanti from DAV Model School, Kharagpur
Class : Class 6
I think it's option B, as at noon we do have a shadow although it's very small, it's not like there's no shadow at all. If my answer is wrong, kindly rectify

Ans 5:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
It should be (b) because (c) shows that there is no shadow at noon, however even in summer, there is a small shadow at noon. Therefore the answer should be (b).

Ans 6:

soumil srivastava from dps, paradip
Class : Class 9
yes c is correct kindly rectify

Ans 7:

Pragnay Priyadarshi from Quantum Leap School, HYDERABAD
Class : Class 7

Post Your Answer