National Science Olympiad Forum By SOF Olympiad Trainer - Page 327
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Shweta Garg from Vibgyor high, Vadodara
Subject :NSO    Class : Class 6

Ans 1:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Answer is D.

Ans 2:

Kavyam Rustagi from Delhi Public School, Ethalbari , Binnaguri
Class : Class 4

Ans 3:

Siddhani Nayak from DPS Paradip Refinery, Paradip
Class : Class 6

Ans 4:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 5:

Deeptajit Roy from Gems Modern Academy, Dubai
Class : Class 10
answer is D, air density decreases on increse in height

Ans 6:

Manaswini Aradhyula from DELHI PUBLIC SCHOOL BANGALORE EAST, Bengaluru
Class : Class 7

Ans 7:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 6

Ans 8:

A S Neeraj from K V 2, Chennai
Class : Class 6
No ans is not D it's B because air is a mixture not an element.

Ans 9:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10
ans is not option D as air is not an element , air is a mixture of many elements and compounds......further more statement 2 is correct as air density decreases with increasing altitude i.e air density decreases with increase in height

Ans 10:

Nuvin Khanna from Mount Olympus School, Gurgaon
Class : Class 6

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Bhavya Agrawal from Cambridge Court High School , JAIPUR
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

The layer of the Earth, which is made up of solid and molten rocks and contains magnesium and iron is mantle, and is represented by R. Earth's mantle is made up of rock and molten lava containing silicon, iron, magnesium, aluminium, oxygen and other minerals.


Ans 2:

Dushyant Singh from Shri Ram Centennial School, Indore
Class : Class 6

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KEERTHANA SHIBU from INDIAN SCHOOL GHOUBRA, Oman
Subject :NSO    Class : Class 6

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

Ans 1:

Vartika Agarwal from Phoenix world school, Pune
Class : Class 9
yes

Ans 2:

Sreevatsa Rajesh from Indian School Al Maabella, Oman
Class : Class 8
SHORT STRECHED AND THIN STRINGS OF GUITAR PRODUCE NOTE OF HIGH PITCH AND VICE VERSA

Ans 3:

Gaurish Singla from DPS School Sector 19, Faridabad
Class : Class 8

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Aanya Mehta from Gems Modern Academy, South City -2, Gurgaon, Gurgaon
Subject :NSO    Class : Class 4

Ans 1:

jathin from national public school chikkabanavara, banglore
Class : Class 4
the correct answer is D because if we throw untreated industrial waste the water bodies the water might get polluted and cannot be safe for drinking and for our uses as it can cause some harmful diseases like cholera and jaundice and also harms the plants and animals in the water

Ans 2:

Aanya Mehta from Gems Modern Academy, South City -2, Gurgaon, Gurgaon
Class : Class 4
4 ans is D cause if we throw untreated industrial wastes in water bodies they will get polluted and we won t be able to drink it

Ans 3:

TARA NAUTIYAL from CONVENT OF JESUS AND MARY, DEHRADUN
Class : Class 4
d is the correct answer because if we throw untreated industrial waste it harms the water we drink

Ans 4:

Ayushman Atreya from Little Heart Toddlers Academy, Angul
Class : Class 3

Ans 5:

Ayushman Atreya from Little Heart Toddlers Academy, Angul
Class : Class 3
hhjj

Ans 6:

Ryan from YBIS , SINGAPORE
Class : Class 5

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SWARIT JAIN from DPS Greater Noida, GREATER NOIDA
Subject :NSO    Class : Class 4

Ans 1:

Dishita Santosh Walujkar from Nutan English School, Kurduwadi
Class : Class 7
B

Ans 2:

jathin from national public school chikkabanavara, banglore
Class : Class 4
the correct answer is : B

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Shreya Shruti from Airforce school , Bengaluru
Subject :NSO    Class : Class 3

Ans 1:

Shreya Shruti from Airforce school , Bengaluru
Class : Class 8

Ans 2:

Ashutosh Baral from mother public school , Bhubaneswar
Class : Class 8

Ans 3:

Advika Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 8
How it is C?Malaria is a water-borne disease spread by mosquitoes.They come near polluted water and may leave infectious germs.

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ARNESH CHAKRABARTI from RAM MOHAN MISSION, KOLKATA
Subject :NSO    Class : Class 5

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Priyam Bhattacharya from cambridge court high school, jaipur
Subject :NSO    Class : Class 6

Ans 1:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
answer is C reason ; magnet :p x point is north pole because it repeled to north pole and other one attract to it then it is south pole .In magnet Q :point x attracted to north pole of real magnet and y reppled then both are said to be magnet.

Ans 2:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9
yes arunav you are right

Ans 3:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10
vasu, no need to apply properties. The options which have both pulled and repelled , are magnet

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ICHALKARANJI from dkte, ichalkranji
Subject :NSO    Class : Class 8

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