National Science Olympiad Forum By SOF Olympiad Trainer - Page 485
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DEV KAPOOR from chaudhary chhabil dass public school, GHAZIABAD
Subject :NSO    Class : Class 3

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Mahati p from cornerstone the public school, deepthi sreenagar colony hyderabad
Subject :NSO    Class : Class 5

Ans 1:

NIVED PRAKASH NAIR from SARVODAYA, THIRUVANANTHAPURAM
Class : Class 8
i and iii is correct,not i and iv

Ans 2:

VISHNU from NARAYANA OLYMPIAD GOPALAPURAM, chennai
Class : Class 5
d is the right answer because when the plant in inside the seed it need air water warmth so it is only in option d

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
Please explain this question to me Revisewise Expert.

Ans 4:

Harsh Sobti from the samhita academy, BLR
Class : Class 5
qwertyuiopasdfghjklzxcvbnm,./;'[]\=-0987654321` _)(*

Ans 5:

Fathima Zahra from Bhavans, Kodungallur
Class : Class 5
Hey there i cant understand that stage p is afectted by staget

Ans 6:

Saanvi Prasad from DPS Noida, Noida
Class : Class 5
A

Ans 7:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 8:

Raghav Srinivasan from GEAR, bangalore
Class : Class 5

Ans 9:

Cheshika batra from Our lady of Fatima convent school, Patiala
Class : Class 5
A

Ans 10:

Ashwak from Cambridge, Jalandhar
Class : Class 9
A is wrong sunlight is needed in stage Q

Ans 11:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
iii and iv are correct.

Ans 12:

sankerths s from Shishya BELM public School, Bangalore
Class : Class 10
The answer is b because photosynthesis starts when the plant comes out of the seed and p does not get affected by what is affecting the stage T of the plant

Ans 13:

Arav Gupta from Delhi Public School Gurgaon, Gurgaon
Class : Class 8
Step 1: option iv is correct and option iv is in option a

Ans 14:

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

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piyush Choudhary from Maxfort School Dwarka , New Delhi
Subject :NSO    Class : Class 6

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Thanks

Ans 2:

piyush Choudhary from Maxfort School Dwarka , New Delhi
Class : Class 6
The answer is D as 1.Rusting Is slow change as it takes a long time for Iron to rust.2.Rusting Is also a chemical change as many chemical reactions occur in The Rusting process 3.Rusting is a Irreversible change as we can not change the effect of rustingThank youI hope I proved to be some help

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Aajani Datta from The Samhita Academy, Bangalore
Subject :NSO    Class : Class 4

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Ayush kumar from Sunbeam school Indiranagar, Varanasi
Subject :NSO    Class : Class 3

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Admin fly from Ddssxxx, Ax
Subject :NSO    Class : Class 6

Ans 1:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
When u know all the answers then what is the need to ask us??

Ans 2:

Raghav Aggarwal from CAMBRIDGE SCHOOL INDIRAPURAM, INDIRAPURAM
Class : Class 7
don't protest

Ans 3:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
P shows the knee joint. The knee joint is a hinge joint, which allows movement along one axis only, to flex or to extend.Q shows a joint where our neck joins the head. It is a pivotal joint. It allows us to bend our head forward and backward and turn the head to our right or left.Now, let’s check the given options and find the incorrect one regarding these two joints:A. Joint P allows movement in one direction only. ----- Correct. Joint P is a hinge joint, which allows movement along one axis only, to flex or to extend.B. Joint Q allows movement in many planes. ----- Correct. Joint Q allows us to bend our head forward and backward and turn the head to our right or left.C. Knee bones have two P joints. ----- Incorrect. Knee bones have just one hinge joint.D. Joint Q acts like a pivot and allows the circular motion of the part around it. ----- Correct. We can move our head around in circular motion at the neck joint.Hence, Option C is the right answer.

Ans 4:

RICHA BORAH from K V ANNA NAGAR, CHENNAI
Class : Class 7
It's incorrect

Ans 5:

Sanvi from K R Mangalam, Ghaziabad
Class : Class 8
Actually the image shown of knee is resembling to shoulder bones that's why its so confusing

Ans 6:

Rithvik Chandra from Greenwood High School, Bangalore
Class : Class 6
even if it looks like shoulder joint, it is incorrect, because shoulder joint has only one hinge joint not two, same for knee. and they said select the INCORRECT option, hence it is option C. And if you dont beleive me ask your science/biology teacher, they will say the same thing.

Ans 7:

Pratheek from Null, Null
Class : Class 4
Very confusing.

Ans 8:

Sarthak Shah from Gitanjali Begumpet, Hyderabad
Class : Class 6

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Admin fly from Ddssxxx, Ax
Subject :NSO    Class : Class 6

Ans 1:

Raghav Aggarwal from CAMBRIDGE SCHOOL INDIRAPURAM, INDIRAPURAM
Class : Class 7
wow

Ans 2:

Agrimn from Gateway International School, Sonipat
Class : Class 6
the answer according to the question is wrong

Ans 3:

Aarav Malviya from INDIAN SCHOOL SALALAH, SALALAH
Class : Class 7
From the image, we can say that the image is formed by a round opaque object. Now, let’s check the following objects and find the one which will not form the above shadow:A. An egg ----- An egg is oval in shape, but if the source of light is placed at either of the ends, the shadow formed would be round.B. A vase ----- A vase can have any size and shape, but usually a regular vase has rounded edges. So, if source of light is placed at either of the ends, the shadow formed would be round.C. A cone ----- A cone has a pointed end, and a flat rounded end. So, if a source of light is placed at either of the ends, the shadow formed would be round.D. A metal ring ----- A metal ring is round, but hollow in between, so light would pass through the central part. So, the shadow formed by the ring will be a round hollow.Hence, the right answer is Option D.

Ans 4:

Shourya from Shanthiniketan public school, Vivekanandanagar ramanagar
Class : Class 6
it should be c. how can it be d as it is hollow at the center?

Ans 5:

Aarav Mishra from D R Amin Memorial school, Baroda
Class : Class 6
Logically it should be C

Ans 6:

Jashith from MVN, Faridabad
Class : Class 8
Ans from the question is wrong. the hollow part will allow light to pass and thus the given shadow will not be formed

Ans 7:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
No, it's d

Ans 8: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 9:

Arsh from Lahs, Gwalior
Class : Class 3
NO !!!!!! THE ANS IS C!!!!

Ans 10:

student from school, city
Class : Class 10
The answer is D.

Ans 11:

piyush Choudhary from Maxfort School Dwarka , New Delhi
Class : Class 6
The answer should be D as all the options except D have a circular point.metal rings also have circle shape for fitting of fingers but they are hollow and let Light pass through it and as we know Light only passes through Opaque objects.

Ans 12:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8
it!!!!!!!!!!! is!!!!!!!!!! ddddddddddddddddddddddd!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 13:

Indrobrata Sarkar from Techno India Group Public School, Chinsurah
Class : Class 6
It will be D !!!!!!!!!!

Ans 14:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8

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Shivam Gupta from Army Public School, Noida
Subject :NSO    Class : Class 5

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Admin fly from Ddssxxx, Ax
Subject :NSO    Class : Class 6

Ans 1:

Admin fly from Ddssxxx, Ax
Class : Class 1
the answer is B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Pranav Shagrithaya from NPS Yelahanka, Bengaluru
Subject :NSO    Class : Class 5

Ans 1:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
C is the correct option as it is saying what is used for 'agriculture'

Ans 2:

V N from BHA, MAHARASHTRA
Class : Class 8

Ans 3:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 4:

Avyay mahajan from Nps international, Singapore
Class : Class 5
It should be B

Ans 5:

Archishman Pal from Sri Krishna Mission School, Agartala
Class : Class 9

Ans 6:

Aaditva from Vasant Valley School, New Delhi
Class : Class 8
B is the answer

Ans 7:

Samriddh from ,
Class : Class 5
Both fern and mushroom have spores.Both A and B can be correct

Ans 8:

Pratham Dave from GNS, Bangalore
Class : Class 7
B is the answer to this question but it is showing C as correct option

Ans 9:

Krithi Manasvini from Alwin Memorial Public School, Chennai
Class : Class 7
Seed drill is a tool used for sowing seeds in agriculture. It has a funnel shaped part where seeds are put in. These seeds are buried deep in the soil through hollow pipes.So b is the answer

Ans 10:

krishneil from Elpro international school, Pune
Class : Class 6
Think the the option should be (b)

Ans 11:

Prisha Shah from Euroschool Airoli, Mumbai
Class : Class 6
shouldn;t the correct ans be B?

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