National Science Olympiad Forum By SOF Olympiad Trainer - Page 574
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sanjana from NARAYANA E TECHNO , Chennai
Subject :NSO    Class : Class 3

Ans 1:

A from ABC, Mumbai
Class : Class 4
b is correct as 72/3= 24 and 55 -24=31

Ans 2:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8

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sanjana from NARAYANA E TECHNO , Chennai
Subject :NSO    Class : Class 3

Ans 1:

Arpit Sahoo from Oxford Angel Public School, DELHI
Class : Class 7

Ans 2:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
The answer key is wrong

Ans 3:

sanjana from NARAYANA E TECHNO , Chennai
Class : Class 8
very easy

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Ujan Anam from Don Bosco Senior Secondary School, Nerul , Navi Mumbai
Subject :NSO    Class : Class 6

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Harsh shrivastava from Carmel convent high school, Ambernath
Subject :NSO    Class : Class 9

Some species of fish can be cultured in a single fish pond. These fish do not compete for food as they have different food habits. In the following options fish are paired with their food habits. Select the incorrect match.

A Labeo rohita – Column feeder
B Catla catla – Surface feeder
C Cirrhinus mrigala – Bottom feeder
D Common carp – Surface feeder


answer is D - common carp is bottom feeder

Ans 1:

from , Nanded
Class : Class 10
D is the correct answer as common carp is an omnivore. But over here the answer is given as A. please remove such glitches.

Ans 2:

Aman Rahman Mondal from Dav public school , Haldia
Class : Class 10

Ans 3:

SHIRIN BHATTACHARYYA from St. Joseph's Convent School, KHANDWA
Class : Class 10
D

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Yashasvika from Euro World School, Sri Ganganagar
Subject :NSO    Class : Class 5

Ans 1:

Athiya Mahapatra from ITL Public School, NewDelhi
Class : Class 5
From Athiya Mahapatra: Option)a As force Q and Z is Gravitational Force.

Ans 2:

Yashasvika from Euro World School, Sri Ganganagar
Class : Class 5
how???

Ans 3:

Sai Lakshmi Rao from Maneckji Cooper Education Trust, Mumbai
Class : Class 4
D

Ans 4:

darsh gupta from S R D A V Public School, delhi
Class : Class 5
ans is d

Ans 5:

Adyanshu Panigrahi from Montfort School, Dhenkanal
Class : Class 6

Ans 6:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM
Class : Class 7
Seriously? The answer is D. It's a "RAP" not a "WRAP" and it is NATIONAL SCIENCE OLYMPIAD not "French, Spanish or Japanese Shing Shong" science Olympiad.

Ans 7:

Kavin from ISG , Muscat, Muscat
Class : Class 5
D

Ans 8:

A Venkata Sai Pranav from Podar International School, Bhusawal
Class : Class 9
Seriously option c are tongs or tweezers

Ans 9:

Praket Tejas from Delhi Public School Indira Nagar Lucknow, Lucknow
Class : Class 4
l

Ans 10:

Raksheet Shah from Swami Vivekanad International School, Mumbai
Class : Class 8
it is d

Ans 11:

ARCHISHA SIKDAR from CHOITHRAM MANIKBAG, INDORE
Class : Class 8
BUOYANT FORCE IS PROPORTIONAL TO VOLUME DISPLACED NOT WEIGHT

Ans 12:

Kavin Karthick M from DPS bangalore east, Bengaluru
Class : Class 6

Ans 13:

Agnish Chakraborty from The Heritage School, Kolkata
Class : Class 5
It is D. And it is SOF not JSS.

Ans 14:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
It is D

Ans 15:

Yajat Manoj from Vibgyor, Bengaluru
Class : Class 5
it surely is d :(

Ans 16:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
its a

Ans 17: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 18:

Syeda Aleeza Zaidi from Somerville school Noida , Noida
Class : Class 5
How can it be A??i did DD

Ans 19:

Rishita Verma from Suncity School, Gurgaon
Class : Class 5
D

Ans 20:

Hari Govind from Delhi Public School Chandigarh , Chandigarh
Class : Class 6
answer is d

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Ansh Meshram from Fr agnel School, New Delhi
Subject :NSO    Class : Class 8

The semi-arid plains of a particular region show a pattern of alternating yellow and black stripes on the ground. The yellow stripes consist of land covered by ripening wheat. The black stripes are bare soil on which no crop is grown but farmers use herbicides or tillage to remove any weeds that try to grow in that region.
Why do farmers in this region manage soils in this way?

A Farmers put the half of their land to rest for minimising erosion and soil degradation.
B Farmers discourage transpiration in the wheat plantation by allowing free evaporation from the soil of the bare stripes.
C Farmers try to store some part of one year’s rainwater in the soil under the bare stripes and use that water to supplement the rain on wheat crop planted the next year.
D All of these


Ans 1:

cherry from atomic energy central school-4, mumbai
Class : Class 9
d

Ans 2:

Shreyas Mekad from Deens Academy, Bengaluru
Class : Class 6
D

Ans 3:

Amazing Kids from DPS Panipat Refinery, Panipat
Class : Class 8

Ans 4:

Shaurya Veer from Army Public School ASC C and C , Bangalore
Class : Class 10
D

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Shaurya from Modern Public School, Bhiwadi
Subject :NSO    Class : Class 4

Ans 1:

NEEV SINGH from VISHWA BHARATI PUBLIC SCHOOL, Noida
Class : Class 8

Ans 2:

Alisha from Delhi Public School , bopal, Ahemdabad
Class : Class 8
how is B correct??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Ans 3:

Student from School, City
Class : Class 8
lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllkkkkkkkkk

Ans 4:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
b is correct shivan dpga

Ans 5:

Prakriti Singh from Ryan International School, Pune
Class : Class 4
B is the answer

Ans 6:

Utsavi Priya from DPS RUBY PARK, KOLKATA
Class : Class 8

Ans 7:

Pradhyumna from J S S Public School, Bengaluru
Class : Class 4
C is correct

Ans 8:

Student from School, City
Class : Class 8
llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

Ans 9:

Manan thorat from Podar powai, Mumbai
Class : Class 4
B is the answer because bubbles are melting inside a pack cointanier so that procces is called as condenstation.

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Shaurya from Modern Public School, Bhiwadi
Subject :NSO    Class : Class 4

Ans 1:

Sashriti Das from Delhi Public School Bangalore North, Bangalore
Class : Class 5
thanks Jaya Shree

Ans 2:

k tagore from montessori school, KURNOOL
Class : Class 3
The answer is b

Ans 3:

Pradhyumna from J S S Public School, Bengaluru
Class : Class 4
B

Ans 4:

Sanaya Singh from Hiranandani Foundation, Mumbai
Class : Class 2
its b

Ans 5:

Sanaya Singh from Hiranandani Foundation, Mumbai
Class : Class 2

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Mrinaal nandini from Kendriya Vidhyalaya Rohini sector 8, Delhi
Subject :NSO    Class : Class 4

Ans 1:

TARA NAUTIYAL from CONVENT OF JESUS AND MARY, DEHRADUN
Class : Class 4
the ans is D overgrazing

Ans 2:

Priyanshi from Delhi Public School, Gurugram
Class : Class 4
D is the correct answer

Ans 3:

Radhika Jain from Sushila Birla Girls' School, Kolkata
Class : Class 5
No doubt it is D ( A - EmbankmentB- Terrace FarmingC- Afforestation D - Overgrazing )( Others prevent soil erosion )

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

Ans 5:

Ryan from YBIS , SINGAPORE
Class : Class 5

Ans 6:

shreyash rawat from podar international school, pune
Class : Class 8
its [d] -overgrazing

Ans 7:

Kriti Bhonsale from Delhi Public School, Bengaluru
Class : Class 5
D IS THE ANSWER

Ans 8:

LAVANYA DADHWAL from BLOOM PUBLIC SCHOOL, South West Delhi
Class : Class 8
D is correct as when you will unscramble the other options all of them prevent soil erosion but D will not (A-embankments B-terrace farming C-afforestation D-overgrazing).....😄

Ans 9:

Rahul from Cambridge school, noida
Class : Class 4
why option d that is overgrazing.... why not Terrace farming that is b

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Diya from DPS, Dubai
Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is A.

Ans 2:

Prathamesh from DPS bhilai, Bhilai
Class : Class 8
count the lines and toatal horizontally. its 10 for first row, 12 for second and must be 14 for third, making it figure with 4 lines that is A as correct option.

Ans 3:

The Address from Somaiya, Mumbai
Class : Class 6
what is the explanation for A

Ans 4:

Student from School, City
Class : Class 8
Mr. Admin from revisewise, Noida, please include an explanation for your answer, A.You have, also, not provided a solution for this.

Ans 5:

Chatresh ramasai gudi from Bgsnps , Bangalore
Class : Class 8
But what if s the pattern.

Ans 6:

MEGHNA SARKAR from Delhi Public School'Rubypark,Kolkata, Kolkata
Class : Class 6

Ans 7:

Dhruvan G from Indian School al Ghubra, Muscat
Class : Class 9
What is the explanation or the solution for A?

Ans 8:

Hprakash09 from Billabong high Bhopal, Bhopal
Class : Class 7
What is the explanation for it being A?

Ans 9:

anirudh from KV IIT, Madras, CHENNAI
Class : Class 8

Ans 10:

Ayush Gorain from Sarala Birla Public School, Ranchi
Class : Class 8
I would like to know what is the logic behind option (A) being the correct answer too.

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