National Science Olympiad Forum By SOF Olympiad Trainer

Eklavya Gondule from DPS Bhilai, BHILAI

Subject :NSO Class : Class 3

In the given food web, an increase in the population of bulbul is likely to cause _________.

A Increase in grasshopper and snake populations
B Decrease in plant and caterpillar populations
C Increase in grasshopper and caterpillar populations
D None of these

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Ans 1:

Dhwani Rautela from PSBB Learning Leadership Academy, BANGALORE

Class : Class 9

Ans 2:

Azara from GWH, b

Class : Class 4

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Jayendra Singh Jasrotia from Jodhamal Public School, Jammu, Jammu

Subject :NSO Class : Class 3

Megha is standing in a line. She is the fourth person from the front and thirteenth person from the back. How many persons are there in the line?

A 14
B 15
C 16
D 17

Correct answer is A.

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Ans 1:

karthik from royale concorde, bangalore

Class : Class 3

c

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Aaditya Malhotra from Isaac Newton Global School, Mumbai

Subject :NSO Class : Class 5

Which of the following groups of animals does not possess vertebral column?

A
B
C
D

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Ans 1:

Aaditya Malhotra from Isaac Newton Global School, Mumbai

Class : Class 3

error

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Havi Jain from GEMS modern academy, Gurgaon

Subject :NSO Class : Class 3

Select the symbol that indicate the weather in which we need to wear both the objects shown in the box.

A
B
C
D

D

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Ans 1:

Ram Prasanna from Basil Woods International, Hyderabad

Class : Class 3

The correct answer is d but they say it is worng

Ans 2:

Sidratul Muntaha from Indian school Muladha, Muladha

Class : Class 5

D because snow is falling in that picture.

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likith from Delhi Public School International School, Singapore

Subject :NSO Class : Class 6

Which of the following is/are correctly matched?

(i)	Process by which waste materials are used to make new products	Recycling
(ii)	Large open areas used for solid waste disposal	Landfills
(iii)	Biomedical waste	Incineration

A(i) and (ii) only
B(ii) only
C(i), (ii) and (iii)
D(iii) only

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AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM

Subject :NSO Class : Class 7

A mirror can form images but a plane glass slab cannot. This is because a mirror

AReflects light while a plane glass slab absorbs light
BRefracts light while a plane glass slab reflects light
CReflects light while a plane glass slab refracts light
DRefracts light while a plane glass slab absorbs light.

ANSWER IS C.

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Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM

Class : Class 10

ANSWER IS C.

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Rudranshu Mishra from Allen, Kota

Subject :NSO Class : Class 7

In the graph, O to C represents a moving body. Which of the following is correct for the motion along BC ?

A Forward with uniform velocity.
B Backward with non-uniform velocity.
C Backward with uniform velocity.
D Forward with non-uniform velocity.

Explain it please

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Ans 1:

manav kedia from Glendale Academy, hyderabad

Class : Class 8

Ans 2:

Derek from Arsha vidya Mandir, Chennai

Class : Class 7

Whenever the displacement decreases with increase in time the velocity will also decrease with time and will not be uniform. This is a displacement time graph not a distance time graph

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Daiwik from DPS, Doha

Subject :NSO Class : Class 7

In column I, three identical lamps P, Q and R are arranged in different configurations, while in column II the information about brightness of lamps are mentioned. Match column I with column II and select the correct option from the given codes. (Neglect resistance of connecting wires)

A (i) → (A, C), (ii) → (A), (iii) → (B, C), (iv) → (C, D)
B (i) → (C, D), (ii) → (B), (iii) → (B, D), (iv) → (A, B)
C (i) → (A), (ii) → (C, D), (iii) → (B, C), (iv) → (B)
D (i) → (B, D), (ii) → (C), (iii) → (B, C), (iv) → (A)