National Science Olympiad Forum By SOF Olympiad Trainer

Soham Yadav from Ryan international School Sector 11 Rohini, New Delhi

Subject :NSO Class : Class 3

Which is the heaviest ball?

A M
B N
C O
D Can‘t be determined

EASY PEASY

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Harsh Sobti from the samhita academy, BLR

Subject :NSO Class : Class 4

Which of the following statements are correct?
1. Vitamin A helps to make our bones and teeth strong.
2. Iron helps in the formation of blood.
3. Potassium is present in sprouts and bananas.
4. Vitamin D helps in wound healing and found in whole grains.

A 1 and 3 only
B 2 and 3 only
C 3 and 4 only
D 2 and 4 only

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Ans 1:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA

Class : Class 4

C

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Riddhima Pandey from Chinmaya Vidyalaya, Bokaro Steel City

Subject :NSO Class : Class 3

Refer to the given word grid and answer the following questions.

How many of these fibres are obtained from animals?

A Two
B Five
C Six
D One

Thanks for the answer

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

A

Ans 2:

Iraj Singh from DPS Megacity, Kolkata

Class : Class 3

Wool and Silk only we can find is obtained from animals.

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Jayanth from The Deens Academy, Bengaluru

Subject :NSO Class : Class 4

The given diagram shows three different ways that a sugar cube can undergo a physical change. Which characteristic of the sugar cube does not change?

(A) Shape

(B) State

(C) Weight

(D) Texture

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Jayanth from The Deens Academy, Bengaluru

Subject :NSO Class : Class 4

How many minimum squares must be shaded to make the figure symmetric along the given line of symmetry ?

(A) 2

(B) 3

(C) 4

(D) 1

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Ans 1:

aayushi anand from AIR FORCE SCHOOL HASIMARA, HASIMARA

Class : Class 4

A

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Chaitanya L K from SKCHEC, bangalore

Subject :NSO Class : Class 7

Rahul gets an assignment to make a list of fabrics made of different fibres. He takes pieces of fabric X and Y and burns them to identify the fibre. Fibre X burns with smell of charred meat and fibre Y burns with smell of burning hair. Identify the fabrics X and Y.

A
B
C
D

ans is B

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Ans 1:

Chaitanya L K from SKCHEC, bangalore

Class : Class 8

ans is b

Ans 2:

Chaitanya L K from SKCHEC, bangalore

Class : Class 8

B is the answer

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Roshni from Mount litera Zee School Goa, Goa

Subject :NSO Class : Class 3

Digit at the tens place in the number that comes as a difference between 5 hundreds 6 tens 13 ones and 7 hundreds 2 tens 15 ones is _________.

(A) 7

(B) 6

(C) 5

(D) 4
can anyone explain this solution

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

B.500+60+13=573 AND 700+20+15=735DIFFERANCE BETWEEN 573 AND 735 =162 ANS 6 TENS PLACE IN 162

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sathvik from nsm public school, vijaywada

Subject :NSO Class : Class 9

Two satellites S₁ and S₂ revolve around a planet in coplanar circular orbits in the same sense. Their periods of revolution are 1 h and 8 h respectively. The radius of the orbit of S₁ is 10⁴ km. When S₂ is closest to S₁, then the speed of S₂ relative to S₁ will be

Aπ × 10⁴ km h^-1
B2π × 10⁴ km h^-1
C1 × 10⁴ km h^-1
D2 × 10⁴ km h^-1