National Science Olympiad Forum By SOF Olympiad Trainer - Page 570
  1. Home
  2. /  Forum

User Forum

Ask Your Question
Souraj Saigovindh from Sri chaitanya Techno school, Tirupur
Subject :NSO    Class : Class 6

Ans 1:

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

Ans 2:

R Ayashkant Jena from St Joseph High School, Bhubaneswar
Class : Class 8
Penguin and ostrich are birds(aves) while a bat is a mammal. Thus, a bat has hair on its skin. An ostrich has feathers on its skin. A penguin has very little or no feather on it so as to make itself streamlined to be able to swim easily.

Ans 3:

Shayan Bari from Kendriya Vidyalaya, Katihar
Class : Class 7
Hippo, whale and cow have skin covering.

Post Your Answer

sankalp from Gyan Bharti School, Saket, Delhi
Subject :NSO    Class : Class 3

Ans 1:

Arihant Medhi from Dps Barasat, Kolkata
Class : Class 8

Ans 2:

Shaurya from Euroschool, Pune
Class : Class 3
I think B is the correct answer because mosquitos and leeches suck blood that they get from humans and animals but butterflies eat nectar that they get from plants

Ans 3:

SS from Amity International School Noida, Noida
Class : Class 8
I think ans B as Hyena is a scavenger and others are predators...

Ans 4:

Adhuna Acharyya from St. Xaviev's School, Burdwan, Burdwan
Class : Class 6

Ans 5:

Debarghya Basak from TECHNO INDIA GROUP PUBLIC SCHOOL, BALURGHAT
Class : Class 8
Correct answer is B

Ans 6:

Tanishka from Gopalan International School, Bangalore
Class : Class 1

Ans 7:

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

Ans 8:

SAMRIDHI RAJ from DAV MODEL SCHOOL, KHARAGPUR
Class : Class 8

Ans 9:

saisavit from sri kumaran ps, bangalore
Class : Class 8
Answer is B because hyena is a scavenger, others are carnivores

Ans 10:

Adrija Guria from Egra Public School , Egra
Class : Class 4
I think right answer will be B as hyena is a scavenger but others are carnivores

Ans 11:

Agnish Chakraborty from The Heritage School, Kolkata
Class : Class 7
I think it is C becuse mosquitoes andleeches suck blood but a butterfly such nectar. Or it can be B.

Ans 12:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 9
D

Ans 13:

Parashuram from Vibgyor, BANGALORE
Class : Class 3
answer is d !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

Ans 14:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8
The answer is option (d) becausei) cows , buffaloes and goats have their food in the same manner called chewing the cud.ii) Lions , wolves and hyena have their food in the same manner called tearing the flesh.iii) Butterflies, mosquitoes and leeches have their food in the same manner called sucking the food.Hence the correct answer is option (d)

Ans 15:

Pritisha priya from Global Indian International School, Abu Dhabi, Abu Dhabi
Class : Class 7

Ans 16:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4

Post Your Answer

Prajwal Thakur from South Point High School, Kolkata
Subject :NSO    Class : Class 3

Ans 1:

Prajwal Thakur from South Point High School, Kolkata
Class : Class 9
ojoo;j 9pu i jp[yuj7u\ p i[u0y7h'p/ 00ujy7mb[o

Post Your Answer

VAIBHAV KALVAKOTA from THE LEXICON INTERNATIONAL SCHOOL WAGHOLI, PUNE
Subject :NSO    Class : Class 8

Post Your Answer

Arjun Sankar from PSBB SS School, Chennai
Subject :NSO    Class : Class 6

Ans 1:

Anika Saha from New Town School, KOLKATA
Class : Class 6
wool.wool.wool.wool.wool.

Ans 2:

harry potter from hogwarts, hogsmeade
Class : Class 6
wooooooooooooooooooooooooooooooooooooooooooooooooooooool

Ans 3:

Naisha from Brilliant public school b, Bilaspur
Class : Class 8
Silk smells like charred meat

Ans 4:

Archisman Biswas from Santipur Municipal High School, Nadia
Class : Class 9
It should be wool. D is the correct answer.

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9
SOF Master Answer Please explain . The answer should be WOOL

Ans 6:

Mishika Singh from EISB, Bangalore
Class : Class 6

Ans 7:

Anamkhan Mulla from Navrachna Sama, Vadodara
Class : Class 7
Exactly, silk smells like charred meat...and wool smells like burning hair.

Ans 8:

Shreyansh Gupta from MVN, faridabad
Class : Class 7
c is correct as the question is saying of pure fabric so the ans. should be c google --(Silk is formed of animal protein secretion of silkworms. Hence , when burnt it smells like hair , which is also composed of animal protein.

Ans 9:

Jayaditya singh from Delhi Public School, gurgaon
Class : Class 9
wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooollllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

Ans 10:

NEELADRI MISHRA from D A V Public School. Unit VIII, Bhubaneshwar
Class : Class 7

Ans 11:

Ishitadas from Adamas World school , Ichapur
Class : Class 8
Smell of burning silk is charred meat, where as smell of burning wool is as burned hair. So answer should be (D).

Ans 12:

Naisha from Brilliant public school b, Bilaspur
Class : Class 8
Wool

Ans 13:

harry potter from hogwarts, hogsmeade
Class : Class 6
woolwooolwoooooooooooooool

Ans 14:

harry potter from hogwarts, hogsmeade
Class : Class 6
wooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooool

Ans 15:

ARNAB PHUKAN from APS DINJAN, DIBRUGARH
Class : Class 6
WOOOOOOOOOOOOOOOOOOOL

Ans 16:

Ayush Yadav from Salwan Public School, Gurgaon
Class : Class 6
It should be wool I even looked it up on the internet. It should be wool!

Ans 17:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Yes the answer should be wool

Ans 18:

Aarya Singh from Indian School Ghubra, Muscat
Class : Class 3
It should be wool. The smell of silk is charred meat.

Post Your Answer

vivaan sethi from GD goenka public school, Delhi
Subject :NSO    Class : Class 3

Ans 1:

AARAVPRADEEP SAHU from PADMASESHADRI BALBHAVAN SENIOR SECONDARY SCHOOL, CHENNAI
Class : Class 3

Ans 2:

Kashika Goel from DPS Noida, Noida
Class : Class 7
no 9

Ans 3:

Santina Suzanne from owis, bangalore
Class : Class 4
PLEASE explain why the answer is 9 and not 11.

Ans 4:

Soumyajit Das from Hariyana Vidya Mandir, NORTH 24 PARGANAS
Class : Class 8
I think there are 9 food chains at all. Please check the diagram of the food web.

Ans 5:

Rishik De Sarkar from Delhi Public School Gurgaon, Gurgaon
Class : Class 7
11

Ans 6:

Tejaojas Abhilash from Naipunya Public School , Kochi, Kochi
Class : Class 9
11 is correct acd acdi acde acdef acdefg acdeg hcdef hcde hcdeg hcd hbg

Ans 7:

Vidhaan Srivastava from Apeejay, NEW DELHI
Class : Class 6

Ans 8:

Mahi from BIS , delhi
Class : Class 5
ans 9

Ans 9:

Parashuram from Vibgyor, BANGALORE
Class : Class 3
Study the given food web and select the correct option for the following questions. How many food chains are there in the food web? A 9 B 11 C 13 D 16ans is c

Post Your Answer

Vishal B from National Public School, Chennai
Subject :NSO    Class : Class 6

Post Your Answer

Hprakash09 from Billabong high Bhopal, Bhopal
Subject :NSO    Class : Class 6

Ans 1:

Sucheta from Podar, Pune
Class : Class 8

Ans 2:

Nivedhini from Vivekanada Vidyalaya Chitlapakkam, Chennai
Class : Class 9
the answer is D

Ans 3:

rethish from Veltech, Avadi
Class : Class 3
Cobalt, Nickel, and Steel are magnetic materials. But Stainless Steel is non-magnetic. There are several different types of stainless steel. The two main types are austenitic and ferritic. Ferritic stainless steels are generally magnetic, while austenitic stainless steels usually are not. Austenitic stainless steel is stainless steel added with nickel. so, the correct answer is Option D.

Post Your Answer

Ishanvi B Nair from DPS Noida, Noida
Subject :NSO    Class : Class 1

Ans 1:

Arin Puri from Delhi Public School Noida, Nodia
Class : Class 2
answer should be B . Plant cannot die in absence of 1 food

Post Your Answer

Bhavit Bansal from Vardhman International School, Jaipur
Subject :NSO    Class : Class 5

Ans 1:

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

Ans 2:

tanmay chaudhry from BAL BHAVAN PUBLIC SCHOOL, New Delhi
Class : Class 4
aswer a jojojojojojojojojojojooojojjjjjojjojjjojoojjjooooojjjjjjjoooojjojojojojojojoo

Ans 3:

Tasneem from FAIPS, kuwait
Class : Class 6
a

Ans 4:

Shweta Garg from Vibgyor high, Vadodara
Class : Class 8
Metal P expands less then Q and metal Q expands less than R. So, metal P expands less than R. If a bimetallic strip is heated it bends with metal which expands more on the outside and the metal which expands less in the inside. So the strip should bend downwards to complete the circuit for the bell to ring.Answer- A.

Ans 5:

Inamul from Springs, Nilambur
Class : Class 9

Ans 6:

Tasneem from FAIPS, kuwait
Class : Class 6
a

Post Your Answer