National Science Olympiad Forum By SOF Olympiad Trainer - Page 361
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BHUVANESH2010 from MAYOOR PRIVATE SCHOOL, ABU DHABI
Subject :NSO    Class : Class 4

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Vaibhav from The Millennium School , Dubai
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

We observe that in the 2nd bottle, water has frozen and overflowed over the rim of the bottle. This means that volume of water increases when it freezes. So. it has expanded beyond the rim of the bottle.


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Arin from suncity, gurugram
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

Dispersal of seed is carried out by wind, water, animals and by explosion. From the given figure it can be inferred that seeds of plants X are dispersed through explosion, e.g., Balsam and pea. Seeds of plant Y are dispersed by wind, e.g., Dandelion and Hiptage while seeds of plant Z are dispersed by animal, e.g., Xanthium, Urena.


Ans 2:

Rimi from TLISK, pune
Class : Class 9
thans for explaining

Ans 3:

Arun from SOT, chennai
Class : Class 6
Dispersal of seed is carried out by wind, water, animals and by explosion. From the given figure it can be inferred that seeds of plants X are dispersed through explosion, e.g., balsam and pea. Seeds of plant Y are dispersed by wind, e.g., dandelion and Hiptage while seeds of plant Z are dispersed by animal, e.g., Xanthium, Urena.

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Aaditya Malhotra from Isaac Newton Global School, Mumbai
Subject :NSO    Class : Class 5

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Shreyan Das from South Point School, Kolkata
Subject :NSO    Class : Class 5
m

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Shreejith from EuroSchool , Bangalore
Subject :NSO    Class : Class 5

Ans 1:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
both A and B is correcty

Ans 2:

Amogha from Hindustan international school, Guindy, Chennai
Class : Class 8
Only B is the answer because in picture A it show that K eats N which is not possible.

Ans 3:

Rahul Narayan Sivakumar from St Kabir, VADODARA
Class : Class 8
Both A and B is correct.

Ans 4:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
both A and B is correcty

Ans 5:

DEBATREE BANERJEE from ADAMAS WORLD SCHOOL, Kolkata
Class : Class 8
Answer is B

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Shreejith from EuroSchool , Bangalore
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Air contains oxygen, which helps in burning. To extinguish a fire it is necessary to cut off the supply of oxygen (air).


Ans 2:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
master answer is wrong it is (A)

Ans 3:

Arnav Nandan from ST PETERS COLLEGE AGRA, Agra
Class : Class 9
why does SOF developers say their answer master answer

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Joe from St.Vincent pallotti, Bangalore
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A


Ans 2:

Daksh Kumar from GCIS, Bangalore
Class : Class 7
A

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Rithvik from BVM Global, Chennai
Subject :NSO    Class : Class 4

Ans 1:

Iraj Singh from DPS Megacity, Kolkata
Class : Class 9
The correct answer is option A not any other option.

Ans 2:

Srihitha from HIS, Bangalore
Class : Class 4
A

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Nandini from Ins, Pune
Subject :NSO    Class : Class 7

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