National Science Olympiad Forum By SOF Olympiad Trainer - Page 336
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Nandini Mahajan from Salwan Public School, Gurgaon
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

The food-chain is starting with X. That means X is a plant (Producers). X is eaten by Y. So, Y must be a Herbivore (for example, animals like deer, rabbit, goat, etc.). And Y is eaten by Z. So, Z must be Carnivore (for example, animals like wolf, lion, hyena, etc.).


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Ankit kumar Jha from Ryan International School , Ghaziabad
Subject :NSO    Class : Class 8

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jeet from Indian School Sohar, Sohar, Oman, Sohar
Subject :NSO    Class : Class 8

Ans 1:

midhuna from ABCD, Hyderabad
Class : Class 8

Ans 2:

Ayush Behera from sunbeam engkish school, bhagwanpur, Varanasi
Class : Class 4
Simazine is pesticde! The answer must be A

Ans 3:

Soham from Vibgyor high, Pune
Class : Class 8

Ans 4:

midhuna from ABCD, Hyderabad
Class : Class 8
BHC is also a pesticide the answer is Dgammaxane too is a pesticide from olympiad prep guide bookpls correct your mistake or if i am wrong give a proper solution

Ans 5:

Ayush Chauhan from Modern Public School, Bhiwadi
Class : Class 9

Ans 6:

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

Ans 7:

Pushkar Sonnekar from Ryan International School, Mumbai, Vasai East
Class : Class 8
But shouldn't it be option C, as 2 and 4 D are fertilizers.

Ans 8:

Rushil from Delhi Public School, Nashik
Class : Class 10
It should be option C because 2 4-D is a pesticide

Ans 9:

cherry from atomic energy central school-4, mumbai
Class : Class 9
shouldnt the answer be a? simazine is also a pesticide

Ans 10:

Ayush Behera from sunbeam engkish school, bhagwanpur, Varanasi
Class : Class 4

Ans 11:

sankalp from Gyan Bharti School, Saket, Delhi
Class : Class 9
MCPA is a weedicide, so it should not be A

Ans 12:

Venya from CHIREC International, Hyderabad
Class : Class 9

Ans 13:

midhuna from ABCD, Hyderabad
Class : Class 8
2 4 -D is a weedicide literally given in ncert too

Ans 14:

Shaurya Veer from Army Public School ASC C and C , Bangalore
Class : Class 10
The answer should be c as that is the only one that has 2,4D as it's option also the SOF solution says the same but shows a different answer

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Aryan from Ihs, Karama
Subject :NSO    Class : Class 9

Ans 1:

Necro from New Tulip international school, Ahmedabad
Class : Class 10

Ans 2:

Necro from New Tulip international school, Ahmedabad
Class : Class 10
Isnt it A?

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Ankit kumar Jha from Ryan International School , Ghaziabad
Subject :NSO    Class : Class 8

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Agriye Kamboj from ST.XAVIER SEC SE CO ed Bhopal, BHOPAL
Subject :NSO    Class : Class 4

Ans 1:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 7
C)

Ans 2:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 8

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

 In the life cycle of butterflies etc., egg hatches to produce a young one called a larva which looks like a worm. After some days, it changes into pupa which finally turns into an adult.


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Ishan Chavan from National Public School Chikkabanavara, Bengaluru
Subject :NSO    Class : Class 3

Ans 1:

Anaahad Mehar Satsangi from Delhi Public School Agra, Agra
Class : Class 3
b

Ans 2: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Blood, Heart and Blood vessels are all parts of the Circulatory system. Similarly, Kidneys, Lungs and Skin are organs of Excretory system.


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Ishan Chavan from National Public School Chikkabanavara, Bengaluru
Subject :NSO    Class : Class 3

Ans 1:

om goyal from rainbow school, saharanpur
Class : Class 3

Ans 2:

Shubhra from DPS, Haridwar
Class : Class 5

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

B

Option A and C has correct statements and option B has incorrect statement. Bird Y can fly. It can be woodpecker, which has feet similar to parrot. Bird X can fly as well as swim. It cannot be the black and white coloured bird found at poles, as it cannot fly.Bird Z runs fast. It can be ostrich that lays largest egg in the world.

 


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Dushyant Singh from Shri Ram Centennial School, Indore
Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C


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aadityaarmaan from KVS Chabua, Dibrugarh
Subject :NSO    Class : Class 7

Ans 1:

aadityaarmaan from KVS Chabua, Dibrugarh
Class : Class 3

Ans 2:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
Oh sorry! The reason is that at X, the ball traveled most distance in less time as compared to other.. That's the reason that the ball has greatest avg. speed at X

Ans 3:

Ishaan Pal from Christ Academy, Bangalore
Class : Class 9
the graph is not clear

Ans 4:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8
The answer is option B. We can see that the difference between w's height (3) and x's height (7) is the highest as compared to others. Therefore the moving ball gained maximum speed at X

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