National Science Olympiad Forum By SOF Olympiad Trainer - Page 58
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Avaneesh Barithaya from New Horizon Scholars School Vasant Lawns, Thane
Subject :NSO    Class : Class 5

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Avaneesh Barithaya from New Horizon Scholars School Vasant Lawns, Thane
Subject :NSO    Class : Class 5

Ans 1:

Divyanshi from The Heritage school, Kolkata
Class : Class 5
That is the question! Practical ans. - Water over fire

Ans 2:

Vivaan A V from Loyola school, Jamshedpur
Class : Class 5
I will show you why it should be none of them.If we pour water on the fire, the fire may die down a little, but the oil can float on the water due to is lesser density compared to H2O and therefore, can still catch fire. For option B, it depends on the type of lid. if we have a lid that is a conductor of heat, it will become a permanent 'NO TOUCH OR GO CLOSE TO' zone; if the handle of the lid is a conductor of heat, it will be hard to remove or move it to another place. And BTW, the theory that says that a fire cannot survive without O2 wont work here as the lid will have tiny gaps through which air and O2 can go through. For option C, it will definitely not work if we blow air from our mouth, but there is an exception for a fire extinguisher. For option D, the fire releases CO (Carbon monoxide) and other harmful gases into the air. So, it would be better to open the windows to let the gases go outside. Option D is the best of them all, but I said none as the problem can literally be solved by silicon dioxide (silica or sand, take your pick). We all know that sand can extinguish fires and the oil is less prone to reignite as sand is a bad conductor of heat.

Ans 3:

Divyamsh from The Sky World School, Panchkula
Class : Class 5
how can we cover fire with lid

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Shuddhi Choubey from euro school mumbai, Mumbai
Subject :NSO    Class : Class 4

Ans 1:

PURWANSHI CHOUDHRY from DAFFODILS WORLDS SCHOOL SIKAR, SIKAR
Class : Class 4
YES

Ans 2:

Saharsh Vyom from JML, Mumbai
Class : Class 4
ITS WRONG! A IS THE ANSWER

Ans 3:

Reyansh Tuli from Greenwood, Bengaluru
Class : Class 4
Yes, answer is A

Ans 4:

SHUBHAN MAITI from MAHATMA GANDHI SISHU SIKSHA SADAN., KALABERIA
Class : Class 4

Ans 5:

Atharv Goyani from Asian International Private School, Abu Dhabi
Class : Class 4
THE ANS IS A. HOW

Ans 6:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
I don't remember that incisors are used for tearing because they AREN'T

Ans 7:

Atharv Goyani from Asian International Private School, Abu Dhabi
Class : Class 4
R

Ans 8:

Shuddhi Choubey from euro school mumbai, Mumbai
Class : Class 4
THE ANS IS A IT IS SHOWING WRONG

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

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

Ans 1:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
NO THAT IS CORRECT and WRONG CARBON dioxide isn't a by product of photosynthesis BUT,so are glucose and energy SO,the answer should be all of the three options B,C, and... D WAIT A SECOND NOBODY IS TYPING IN THE CHAT BOX!? THE ENTIRE CHAT BOX TO MESELF!?!?!?! noice AKA nice

Ans 2:

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

Ans 3:

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

Ans 4:

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

Ans 5:

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

Ans 6:

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

Ans 7:

Aarvi Gosai from The New Tulip International School, Ahemdabad
Class : Class 4
P.S. AKA means also known as and by meself a I mean myself

Ans 8:

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

Ans 9:

Avnish Katti from ST. JOHN'S HIGH SCHOOL SIDDHARTH NAGAR, BORIVALI , MUMBAI
Class : Class 4
Hehe

Ans 10:

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

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Avigyan from DPS Numaligarh, Golaghat
Subject :NSO    Class : Class 5

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Atharva from Royal Global School, Guwahati
Subject :NSO    Class : Class 3

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Devisha Mehta from Saint MSG Glorious International School, Sirsa
Subject :NSO    Class : Class 2

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Devisha Mehta from Saint MSG Glorious International School, Sirsa
Subject :NSO    Class : Class 2

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Snigdha Gootala from Canary School, Hyderabad
Subject :NSO    Class : Class 6

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