National Science Olympiad Forum By SOF Olympiad Trainer - Page 492

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Subject :NSO    Class : Class 3

Ans 1:

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 2:

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 3:

Class : Class 3

Ans 4:

Class : Class 5
the spi

Ans 5:

Class : Class 3
D

Ans 6:

Class : Class 8
D because spinal cord helps brain to control the body.

Ans 7:

Class : Class 4
It will be kidney because lungs give out carbon dioxide as waste.Heart is the wrong answer........

Ans 8:

Class : Class 3
I think both kidneys and hearth are correct. beacause lungs are in respiratory,curculatory and excretory system as they help us to brathe ,make pure blood and also the blood goes from hearth then lungs and then all parts. Plese tell how hearth is wrone.

Ans 9:

Class : Class 3
I think option a is also correct with option d as lungs are in curcularury system system too as the blood first goes to the lungs after the heath and then the body. Lungs also filter air and help us breathe so they are in excretory and resperatory system too. Plese tell how option a hearth is wrong .

Ans 10:

Class : Class 5
I think it should be heart not kidney

Ans 11:

Class : Class 6
I thinks it should be heart. As lungs are connected with the heart not kidney.

Ans 12:

Class : Class 5
spinal cord connects every organ to brain an

Ans 13:

Class : Class 3

Ans 14:

Class : Class 3
Heart is the correct answer

Ans 15:

Class : Class 8
i think heart is correct answer. please elaborate, how come kidney is right answer a

Ans 16:

Class : Class 6
Heart

Ans 17:

Class : Class 5

Ans 18:

Class : Class 5
Answer is D because both lungs n kidney are in Exetery system

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
use your brain bro

Ans 2:

Class : Class 5
You can earn badges by studying hard in sof , like doing tests, previous year papers, mock tests, etc.

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

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

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
I don't understand tbh

Ans 2:

Class : Class 1
@Bhagyesh You need to use your brain and do it with your hands. Simple. @Raavi no need of that big thingy

Ans 3:

Class : Class 7

Ans 4:

Class : Class 1

Ans 5:

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 6:

Class : Class 8

Ans 7:

Class : Class 8
option a

Ans 8:

Class : Class 8
option a

Ans 9:

Class : Class 7
why not option c?

Ans 10:

Class : Class 4
how priyanka

Ans 11:

Class : Class 8
This is wrong. The answer should be C, due to induction. The positive charges move to the bottom as they repel, while the negative particles should move to the top, as they are attracted to the positive particles in the bar.

Ans 12:

Class : Class 8
how to do it

Ans 13:

Class : Class 7

Ans 14:

Class : Class 7

Ans 15:

Class : Class 1
@Bhagyesh You need to use your

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 9
Loudspeakers use electromagnets.So,the answer should be (B)

Ans 2:

Class : Class 9

Ans 3:

Class : Class 10
Loudspeakers use electromagnets, so the answer is option B

Ans 4:

Class : Class 10
loud speakers have both electromagnets and permanent magnets

Ans 5:

Class : Class 9
Loudspeakers use electromagnets so it should be answer b

Ans 6:

Class : Class 8
But all of them use permanent magnets...so D is correct

Ans 7:

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

Ans 8:

Class : Class 7
Loudspeakers use electromagnets.

Ans 9:

Class : Class 9
The answer is B as loudspeakers use electromagnets and the magnetic field isn't there always .

Ans 10:

Class : Class 10

Ans 11:

Class : Class 6
answer is B so obvious

Ans 12:

Class : Class 7
Don't loudspeakers use electromagnets?

Ans 13:

Class : Class 10
answer will be b as loudspeakers use electromagents

Ans 14:

Class : Class 7
answer should be b

Ans 15:

Class : Class 5
Loud speakers use permanent magnets

Ans 16:

Class : Class 10
they use both so the answer is d

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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

Ans 3:

Class : Class 6

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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 9
The answer is B

Ans 3:

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

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
solution?

Ans 2:

Class : Class 10
c is the answer

Ans 3:

Class : Class 6
c

Ans 4:

Class : Class 6
can I have an explanation please....... plz...plz...plz...

Ans 5:

Class : Class 9

Ans 6:

Class : Class 8
How is it C!?

Ans 7:

Class : Class 7
its C acording to me

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