National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
You have to specify if waxing or waning crescent

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
Option D is correct because current prefers the path that offers less resistance. The bulb provides resistance whereas the switch when closed does not. Hence correct answer is D

Ans 2:

Class : Class 8
The answer key says that X will not light up,but why?

Ans 3:

Class : Class 8
I too am confused as current will also flow through both the bulbs when circuit is closed. It will pass through the switch first and hence lighting up bulb Y.

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Class : Class 9
Yess,my answer was B also

Ans 5:

Class : Class 8
The answer is B

Ans 6:

Class : Class 8
yes i too did B

Ans 7:

Class : Class 8
X will light up... I think it's incorrect....

Ans 8:

Class : Class 8

Ans 9:

Class : Class 8
Please explain it. I am also confused about the answer. I myself did B.

Ans 10:

Class : Class 8
logically it should be B but sof says otherwise. why ????

Ans 11:

Class : Class 6
The answer should be B as it will be closed circuit

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5

Ans 3:

Class : Class 5
Sorry , my brother changed the C into D . It should be C only !

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Class : Class 5
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 5:

Class : Class 5
The answer is d

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
The answer is c

Ans 8:

Class : Class 4
d

Ans 9:

Class : Class 4
Low High Many Many

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Which of the following is NOT hidden in the given word grid?


AStructure present in polar bear that protects it from cold and a structure present in Scoliodon that enables it to breathe underwater.
BBehavioural adaptation that helps Siberian cranes to escape cold winters of their homeland and structural adaptation that helps them to fly.
CPhenomenon wherein chameleon blends with its surrounding by changing its skin colour to remain unnoticed by its prey.
D Phenomenon wherein a leaf insect externally resembles a plant leaf to remain unnoticed by its predator.


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Subject :NSO    Class : Class 4

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