National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 3
A

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 2:

Class : Class 3
D because spinal cord helps brain to control the body.

Ans 3:

Class : Class 6
lungs and spinal cords are part of nervous system so lungs and kidney are part of excretory system(lungs dispose co2 from body)

Ans 4:

Class : Class 3

Ans 5:

Class : Class 3
Answer is D because both lungs n kidney are in Exetery system

Ans 6:

Class : Class 3
i think brain n spinal cord are parts of nervous system whereas kidneys n lungs are part of excretory system,through lungs we inhale o2 n exhale co2,kidneys excrete urines

Ans 7:

Class : Class 3
D

Ans 8:

Class : Class 4

Ans 9:

Class : Class 3
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 10:

Class : Class 4
Heart

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
use your brain bro

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Subject :NSO    Class : Class 8

Refer to the given passage and answer the following questions.
An experiment is conducted by a student to check the conductivity of potato and the set-up is shown here.

What happens to the compass needle when the switch is closed?

A The compass needle will point towards the right.
B The compass needle will point towards the left.
C The compass needle will not deflect.
D The compass needle will point downwards.


Please answer this

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
Please explain your answer. I am really confused.@UTKARSH SAWARN

Ans 2:

Class : Class 8
IN MY OPINION OPTION C IS THE CORRECT ANSWER

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
@bhagyesh .As metal rod or electroscope is positively charged all the currents flown to the object will be positive and the leaves will repel each other

Ans 2:

Class : Class 8
how to do it

Ans 3:

Class : Class 8
option a

Ans 4:

Class : Class 8
option a

Ans 5:

Class : Class 4
how priyanka

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Don't loudspeakers use electromagnets?

Ans 2:

Class : Class 7
Loudspeakers use electromagnets, so the answer is option B

Ans 3:

Class : Class 6
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 4:

Class : Class 6
But all of them use permanent magnets...so D is correct

Ans 5:

Class : Class 6

Ans 6:

Class : Class 6
answer is B so obvious

Ans 7:

Class : Class 6
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 8:

Class : Class 6
answer will be b as loudspeakers use electromagents

Ans 9:

Class : Class 6
Loud speakers use electromagnets as they dont need magnetic force when not in use so ans is B

Ans 10:

Class : Class 7
answer should be b

Ans 11:

Class : Class 7
Loudspeakers use electromagnets.

Ans 12:

Class : Class 6
Loudspeakers use electromagnets so it should be answer b

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6
as only the option (D) will be magnetic and the SOFT IRON will act as a keepers

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Ans should be A because tuemeric powder is solid and solids are incompressible. Liquids are also incompressible but the some of the liquid has gone above the end of the piston, which is inside the syringe. Gases are compressible, so the piston easily moves.

Ans 2:

Class : Class 5
The answer is B

Ans 3:

Class : Class 6
Well... I think the answer is B

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