National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
B

Ans 2:

Class : Class 4
the correct answer is : B

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Subject :NSO    Class : Class 3

Read the discussion given below. Which option holds true regarding this discussion?

Renu : Humus present in top layer of soil is good for plant growth.
Rashmi : Water cycle involves continuous processes of evaporation and condensation.
Sanjay : Drinking water polluted with wastes from sewage and homes causes diseases like malaria.
Deetya : Matter is anything that has mass and occupies space.

AOnly Sanjay and Deetya made correct statements.
BRenu made an incorrect statement while Rashmi and Sanjay made correct statements.
CRashmi, Deetya and Renu made correct statements.
DRenu and Sanjay made correct statements while Rashmi and Deetya made incorrect statements.


Water cycle involves evaporation condensation and precipitation.

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
How it is C?Malaria is a water-borne disease spread by mosquitoes.They come near polluted water and may leave infectious germs.

Ans 3:

Class : Class 2

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
yes arunav you are right

Ans 2:

Class : Class 6
vasu, no need to apply properties. The options which have both pulled and repelled , are magnet

Ans 3:

Class : Class 6
answer is C reason ; magnet :p x point is north pole because it repeled to north pole and other one attract to it then it is south pole .In magnet Q :point x attracted to north pole of real magnet and y reppled then both are said to be magnet.

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Subject :NSO    Class : Class 8

Match column I with column II and select the correct option from the codes given below.

Column I Column II
(A) A non-metal, essential for respiration (i) Graphite
(B) A non-metal, the source of energy in Sun (ii) Silicon
(C) A non-metal, good conductor of electricity (iii) Oxygen
(D) A non-metal, used in semiconductors (iv) Hydrogen


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


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Subject :NSO    Class : Class 4

Refer to the given figure representing integration of different human systems X, Y and Z. Select the option that correctly identifies these systems.


AX - Digestive system Y - Circulatory system Z - Respiratory system
BX - Respiratory system Y - Circulatory system Z -Digestive system
CX - Circulatory system Y - Digestive system Z -Respiratory system
DX - Digestive system Y - Respiratory system Z -Circulatory system


Ans 1:

Class : Class 5
Please someone tell me the answer

Ans 2:

Class : Class 5

Ans 3:

Class : Class 4
the correct option is : A ]

Ans 4:

Class : Class 8
give solution

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 8
giveslution

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 5

Ruchi categorised animals on the basis of their body coverings. She made three groups and by mistake placed one wrong member in each group. Identify the wrong member of each group and select the correct option.
Group I - Snake, Lizard, Crab
Group II - Sloth, Platypus, Salmon
Group III - Penguin, Pigeon, Grasshopper

ACrab of group I should be interchanged with grasshopper of group III.
BSalmon of group II should be replaced with toad.
CPlatypus of group II should be interchanged with pigeon of group III.
DGrasshopper of group III should be replaced with parakeet.


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Ans 1: (Master Answer)

Class : Class 1

D

In group III, body of penguin and pigeon is covered with feathers. Similarly body of parakeet is also coverd with feathers. So, grasshopper of group III should be replaced with parakeet.


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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
Even I think so As the red data book is maintained with IUCN not WCU

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
It’s IUCN that maintains red data book

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 2
All of the options are correct.

Ans 2:

Class : Class 8
The answer is D.. The whole diagram is only showing the gynoecium or the female part of the flower only, so B is correct, as you got confused in..

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