National Science Olympiad Forum By SOF Olympiad Trainer - Page 438

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

Ans 2:

Class : Class 7
OPTION D IS MISSING! IT CAN BE BOTH A

Ans 3:

Class : Class 9

Ans 4:

Class : Class 9

Ans 5:

Class : Class 7
A and B both r correct so they should make option D as both A and B even there is no option D so ya possible

Ans 6:

Class : Class 10
I think option d is missing and it might be both a and b as both of them r correct

Ans 7:

Class : Class 7
Option D is missing!!! And Option A and B can also be the answer as both of them are correct. The options in the question itself is an error as there is no option D!

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 7
very tricky

Ans 2:

Class : Class 5
it is a piece of cake

Ans 3:

Class : Class 3
D

Ans 4:

Class : Class 8
The correct answer is D

Ans 5:

Class : Class 5
It is very tricky question.

Ans 6:

Class : Class 6
What a tricky question!

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4

Ans 2:

Class : Class 6

Ans 3:

Class : Class 6

Ans 4:

Class : Class 8
D

Ans 5:

Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 3
B

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Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

Class : Class 3
D

Ans 3:

Class : Class 4
spinal cord connects every organ to brain an

Ans 4:

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 5:

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

Ans 6:

Class : Class 3

Ans 7:

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 8:

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

Ans 9:

Class : Class 3
It will be kidney because lungs give out carbon dioxide as waste.Heart is the wrong answer........

Ans 10:

Class : Class 6
Heart

Ans 11:

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 12:

Class : Class 7
D because spinal cord helps brain to control the body.

Ans 13:

Class : Class 3

Ans 14:

Class : Class 3
Heart is the correct answer

Ans 15:

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 16:

Class : Class 8

Ans 17:

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

Ans 18:

Class : Class 4
the spi

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
use your brain bro

Ans 2:

Class : Class 4
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

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
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
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 2:

Class : Class 8

Ans 3:

Class : Class 8
how to do it

Ans 4:

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 5:

Class : Class 7
why not option c?

Ans 6:

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 7:

Class : Class 1
@Bhagyesh You need to use your

Ans 8:

Class : Class 8
option a

Ans 9:

Class : Class 1

Ans 10:

Class : Class 7
I don't understand tbh

Ans 11:

Class : Class 7

Ans 12:

Class : Class 4
how priyanka

Ans 13:

Class : Class 7

Ans 14:

Class : Class 8
option a

Ans 15:

Class : Class 7

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