National Science Olympiad Forum By SOF Olympiad Trainer - Page 391
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Subham Mishra from WwA cossipore English school, kolkata
Subject :NSO    Class : Class 3

Ans 1:

ADVAY BANSAL from LOTUS VALLEY INTERNATIONAL SCHOOL GURUGRAM, GURUGRAM
Class : Class 6
that was easy

Ans 2:

Subham Mishra from WwA cossipore English school, kolkata
Class : Class 3
What is the meaning of S here. please clarify. S is something which is natural i believe.

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Bhavya Sheth from Bright Day School, Vadodara
Subject :NSO    Class : Class 4

Ans 1:

Rishon Chandy from KV IIT Powai, Mumbai
Class : Class 7

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

Air contains approximately 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, and small amounts of other gases.


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Anushka Srivastava from Cjm, Dehradun
Subject :NSO    Class : Class 7

Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 10
B

Ans 2:

Arjun from Sri Kumaran Public School - ICSE, Bengaluru
Class : Class 8
This is wrong. Hydra is a Cnidarian, therefore the waste exits through its mouth.

Ans 3:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7
9jh

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Amol Athawale from WoodRidge High, aurangabad
Subject :NSO    Class : Class 8

Ans 1:

A Venkata Sai Pranav from Podar International School, Bhusawal
Class : Class 9
It should be B

Ans 2:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7

Ans 3:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7

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PARTH MEHTA from Navrachana school, Vadodara
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Human adults have 4(P) types of teeth in their dentition. These are Incisors(Q), Premolars(R), Canines(S) and molars. Incisors(Q) helps in cutting or biting food. There are 4(T) Incisors(Q) in each jaw. Premolars(R) teeth are absent in milk teeth set but there are 8(U) such teeth in permanent teeth set. Canines(S) are four in number and helps in Tearing(V) food.


Ans 2:

SAGNIK from Delhi public school, ruby park, kolkata
Class : Class 5

Ans 3:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 2
NA

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PARTH MEHTA from Navrachana school, Vadodara
Subject :NSO    Class : Class 4

Ans 1:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4

Ans 2:

Hitansh Madhav from GIIS Noida, Noida
Class : Class 4
it is d

Ans 3:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4
C is correct. This is because they get almost the same amount of sunlight throughout the year. They also get straight rays of the sun.

Ans 4:

PARTH MEHTA from Navrachana school, Vadodara
Class : Class 6
Answer shud be d

Ans 5:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4
I was kidding

Ans 6:

Naisha Gupta from DPS School, Khajaguda, Hyderabad
Class : Class 4
(MASTER ANSWER) C

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PARTH MEHTA from Navrachana school, Vadodara
Subject :NSO    Class : Class 4

Ans 1:

suhana priyadarsini nayak from Orchid international school , Bengaluru
Class : Class 7
Answer b will be the correct answer as mosquito is not a social insect while others are termite is not useful insect and honey bee is a useful insect

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B


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ISHAN DAS from DELHI PUBLIC SCHOOL , ANGUL
Subject :NSO    Class : Class 4

Ans 1:

jathin from national public school chikkabanavara, banglore
Class : Class 4
THE ANSWER C

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Naman from Uis, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

Shivesh Dan from BAL BHARATI PUBLIC SCHOOL, NOIDA
Class : Class 3
correct answer C because candles, sun, torches, diya, and bulbs are luminous objects and if we count them, there are five luminous objects.

Ans 2:

Anaahad Mehar Satsangi from Delhi Public School Agra, Agra
Class : Class 3
the correct answer will be c

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Shreya Sudarshan from Creaa academy for learning , Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

P A Reyyansh from Ann Mary School, Dehradun
Class : Class 10
this was ez

Ans 2:

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

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Rahul and Ravi both cover different distances XOY and XY respectively at the same time. It is clear from the figure  that the distance XOY is longer than distance XY .So, the speed of Rahul must be greater than that of Ravi.


Ans 4:

Vedant from DON BOSCO, CHENNAI
Class : Class 2
rrrrrrrrrrrrrrrrrrr

Ans 5:

Yashraj from pps, pune
Class : Class 6
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb

Ans 6:

Ashwak from Cambridge, Jalandhar
Class : Class 9
B

Ans 7:

Sarang Shete from Amanora School, Pune
Class : Class 8
b'

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