National Science Olympiad Forum By SOF Olympiad Trainer - Page 370
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Mohul Gandhi from Podar International School, Powai, Mumbai
Subject :NSO    Class : Class 5

Ans 1:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
Check the options given for most correct answer:(i) is dispersed by wind. So it should be very light in weight. Correct answer could be Maple (Option A) or Milkweed (Option B). Both are very light.Next, Coconut and Lotus are dispersed by X. Both of these grow very near to water. So, they will be dispersed by water. That means X is Water. So, Option A and Option C could be the right answer.But Option A is common in both. So, let’s confirm by checking the right option for (ii) and Y.Seeds dispersed by Animals will be Mango and (ii). Cocklebur are the seeds of Xanthium. They are hard and have stiff, pointed thorns/spines. So, these attach to the animals’ hides and taken away. So, (ii) is Cocklebur.Peas and Poppy seeds are dispersed when the fruits split and burst open. So, Y is Explosion.That means Option A is the correct answer

Ans 2:

shaurya from St Gregorios High school, Mumbai
Class : Class 5
A

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

In the given classification chart X could be water as coconut and lotus disperse their seeds through water and Y could be explosion as pea and poppy disperse their seeds through explosion. (i) gets dispersed by wind, so it could be maple or milkweed. (ii) gets dispersed by explosion so it could be cocklebur.


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Ronav Kerkar from Jamnabai Narsee School, Mumbai
Subject :NSO    Class : Class 4

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Amitava Pushilal from International Schooling, Singapore
Subject :NSO    Class : Class 5

Ans 1:

rahul from euroschool, Mumbai
Class : Class 8

Ans 2:

rahul from euroschool, Mumbai
Class : Class 8

Ans 3:

rahul from euroschool, Mumbai
Class : Class 8

Ans 4: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

A lunar eclipse occurs when the Earth comes in between the Sun and the Moon.


Ans 5:

Debarpan Das from Delhi Public School , Durgapur
Class : Class 9

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SIDDHARTH SOMANI from Vibgyor High, Mumbai
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

A

P is not a natural fibre. so, it can be any synthetic fibre like nylon or rayon. Q can be any natural fibre that is obtained from plant. So, it can be cotton or jute. R an be any natural fibre that is obtained from animal. So, it can be wool or silk.


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Arnav Vashisth from GD GOENKA PUBLIC SCHOOL, Delhi
Subject :NSO    Class : Class 3

Ans 1:

Nishant Hazarika from Air Force School, Dibrugarh
Class : Class 3
C can also be the answer as the planets between Venus and Jupiter are Mars and Earth

Ans 2:

Samik Praveen from Euro School Airoli, Mumbai
Class : Class 6

Ans 3:

Vartika kumar from D P S Newtown, Kolkata
Class : Class 8

Ans 4:

Kashika Goel from DPS Noida, Noida
Class : Class 7
no because between Venus and Jupiter 2 planets come in between so they may be talking of mars also we don,t know that and we are sure that option a and b are correct hence d is correct

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prakash jahagirdar from amanora school, Pune
Subject :NSO    Class : Class 7

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Admin fly from Ddssxxx, Ax
Subject :NSO    Class : Class 7

Ans 1:

NIRANJAN A from national public school, NAMAKKAL
Class : Class 7
i think it is option A.

Ans 2:

Admin fly from Ddssxxx, Ax
Class : Class 1

Ans 3:

NIRANJAN A from national public school, NAMAKKAL
Class : Class 7
i think it is option A.

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Snigdha swaminath from Christ nagar higher secondary school , Trivandrum
Subject :NSO    Class : Class 6

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

 

In the given figure P is flower, Q is fruit, R is leaf, S is stem and T is root. In cabbage, leaves are modified to store food. Fruit is not always edible in all plants. In some plants, other parts such as roots, stems, etc., are edible. In potato, the stem stores food and becomes swollen.


Ans 2:

ANURAG MOHANTY from DAV Public School Burla, SAMBALPUR
Class : Class 10

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Ishan Boggarapu from NPS Whitefield, Bangalore
Subject :NSO    Class : Class 3

Ans 1:

Sahana from dpsnoida, Noida
Class : Class 3

Ans 2:

Bhumanyu Bora from Delhi Public School, Duliajan
Class : Class 5
oh yeah , you are right its D

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

In the given food chain if the population of frog decreases, then it will lead to an increase in the grasshopper population. As there will be less frogs to feed upon the grasshoppers.


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Sneha Sarkar from South city international school, Kolkata
Subject :NSO    Class : Class 3

Ans 1:

Sanyam Gupta from DPS Noida, Noida
Class : Class 3
hi

Ans 2:

Shruti from ,
Class : Class 1
March has 31 days

Ans 3:

Shriram from Velammal New Gen, Madipakkam, Chennai
Class : Class 5

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