National Science Olympiad Forum By SOF Olympiad Trainer - Page 709
  1. Home
  2. /  Forum

User Forum

Ask Your Question
ANANYA.KUMAR from DPS Noida, Noida
Subject :NSO    Class : Class 5

Ans 1:

Nishant Doshi from new era senior secondary school nizampura vadodara, Vadodara
Class : Class 7
Sun 's surface is about 6000 degrees celcius and blue star is 28000 degrees celcius so to find the answer 28000 -6000 which equals to 22000degrees celcius is blue star hotter than Sun .

Post Your Answer

Sarbari Pal from DPS FARIDABAD, Faridabad
Subject :NSO    Class : Class 6

Ans 1:

Sevanthi. B. R from Saint Paul's English school, Bengaluru
Class : Class 6
Tricky

Ans 2:

Yoovan from Xyz school, Delhi
Class : Class 10
B is the answer because like poles repel.

Ans 3:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 10
the fig is wrong because the in the fig there should be repeltion and they have given attraction.

Ans 4:

Ayansh Mallick from ,
Class : Class 6
first of all the answer itself is wrong even if its B shouldn't be q repelling p not vice versa

Post Your Answer

Anish Bharadwaj from Delhi public school , Singapore
Subject :NSO    Class : Class 6

Ans 1:

SANVIKA TRIPATHY from JBCN International Chembur, Mumbai
Class : Class 6
Landfills pollute land and water so they are located on the outskirts of the city

Ans 2:

ANANYA SHAH from UDGAM SCHOOL FOR CHILDREN , AHMEDABAD
Class : Class 8
Anybody has an explanation?

Ans 3:

varun Gupta from arya vidya mandir, Mumbai
Class : Class 8

Ans 4:

Tejesh VB from GEMS New Millennium School, Al Khail, Dubai
Class : Class 8

Post Your Answer

ISHI.GUPTA from dps noida, Noida
Subject :NSO    Class : Class 3

Ans 1:

SANGLAP MUKHERJEE from ST XAVIERS SCHOOL , BURDWAN
Class : Class 4
I’m saying the same term of Anush nikam

Ans 2:

Anush nikam from Lexicon, pune
Class : Class 3
It’s mosquito..it sucks blood so answer is A

Ans 3:

Ashlynn Bhatia from Modern Vidya Niketan Sr. Secondary School Sector - 17, FARIDABAD
Class : Class 4
C'mon . In correct answer they are showing B and in solution they are showing A . I mean , at least somebody should check the system for errors

Ans 4:

Amitava Pushilal from International Schooling, Singapore
Class : Class 6
D

Ans 5:

Ashlynn Bhatia from Modern Vidya Niketan Sr. Secondary School Sector - 17, FARIDABAD
Class : Class 4

Ans 6:

Deshna Singh from Lexicon International, Pune
Class : Class 3
The correct ans is D

Ans 7:

Joshua Edwin Desouza from DPS International, Singapore, Singapore
Class : Class 3
Its a Mosquito. It sucks blood. The answer is A.

Ans 8:

Kashika Goel from DPS Noida, Noida
Class : Class 7

Post Your Answer

Ankita Dharmani from Euroschool, Mumbai
Subject :NSO    Class : Class 5

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

Ans 8:

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

Ans 9:

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

Ans 10:

Ruhaan Singh from Gopalan International School, Bangalore
Class : Class 6
D

Ans 11:

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

Ans 12:

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

Ans 13:

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 14:

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

Ans 15:

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

Ans 16:

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

Ans 17:

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

Ans 18:

Shreyansh from Hariyana Vidya Mandir, Kolkata
Class : Class 6
Correct option is D because mineral deposits are found on the crust of the Earth

Ans 19:

aarav shankar from st xaviers high school, gurugram
Class : Class 7
No, the inner core is actually made up of iron and nickel.

Ans 20:

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

Ans 21:

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

Ans 22: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 23:

Apurv from Delhi Public School , Ambala
Class : Class 1

Ans 24:

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 25:

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

Ans 26:

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

Ans 27:

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

Ans 28:

Kashyap Shankar from NPS, Singapore
Class : Class 6
D

Ans 29:

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 30:

from GIIS,
Class : Class 4
Answer is = D

Ans 31:

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

Ans 32:

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

Post Your Answer

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

Ans 1:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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 6:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 7:

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 8:

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 9:

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 10:

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

Ans 11:

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

Ans 12:

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 13:

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 14:

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 15:

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

Ans 16:

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 17:

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

Ans 18:

Shreyansh Gupta from MVN, faridabad
Class : Class 6
the answer is B.

Ans 19:

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

Ans 20:

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

Ans 21:

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

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:

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

Ans 24:

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

Ans 25:

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

Ans 26: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 27:

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

Ans 28:

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 29:

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

Ans 30:

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

Ans 31:

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 32:

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 33:

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 34:

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

Ans 35:

Saani from Cambridge School, Mangalore
Class : Class 9

Ans 36:

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

Ans 37:

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

Ans 38:

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

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:

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

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

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

Post Your Answer

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

Post Your Answer