National Science Olympiad Forum By SOF Olympiad Trainer - Page 496

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
You need to specify whether it is a waxing or waning crescent.

Ans 2:

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

Ans 3:

Class : Class 8

Ans 4:

Class : Class 4

Ans 5:

Class : Class 4
you need to specify if waning or waxing crescent

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
The answer is B

Ans 2:

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

Ans 3:

Class : Class 10
b

Ans 4:

Class : Class 8

Ans 5:

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

Ans 6:

Class : Class 7
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.

Ans 7:

Class : Class 7
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb is correct as current will flow though X but I do feel that current will prefer less resistant path so D can also be correct

Ans 8:

Class : Class 9
yes i too did B

Ans 9:

Class : Class 10

Ans 10:

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

Ans 11:

Class : Class 3
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 12:

Class : Class 9

Ans 13:

Class : Class 8
It must be B.The current finds a more direct path to Y, Making it brighter.But the current still reaches X because there is still a path. SOF Says otherwise.

Ans 14:

Class : Class 9
Yess,my answer was B also

Ans 15:

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

Ans 16:

Class : Class 7
answer should be b because X will also lit up

Ans 17:

Class : Class 4
answer should be B

Ans 18:

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

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
ans is D so easy

Ans 2:

Class : Class 6
Veer Sehrawat, how c, the question says which town is located near an unpolluted river not a polluted river.

Ans 3:

Class : Class 7
Sorry , my brother changed the C into D . It should be C only !

Ans 4:

Class : Class 9

Ans 5:

Class : Class 4
d

Ans 6:

Class : Class 10

Ans 7:

Class : Class 7

Ans 8:

Class : Class 10
Sorry all, I had not read the question well.😞😞

Ans 9:

Class : Class 7

Ans 10:

Class : Class 4
Low High Many Many

Ans 11:

Class : Class 3
D

Ans 12:

Class : Class 5
no chart no answer

Ans 13:

Class : Class 6
The answer is d

Ans 14:

Class : Class 7
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 15:

Class : Class 9
The answer is c

Ans 16:

Class : Class 7
I was a bit confused between C and D

Ans 17:

Class : Class 7

Ans 18:

Class : Class 5
c

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9

Ans 2:

Class : Class 5
NA

Ans 3:

Class : Class 7

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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.


Ans 1:

Class : Class 8

Ans 2:

Class : Class 7
Mocking or copying.

Ans 3:

Class : Class 5
😓😓copying

Ans 4:

Class : Class 5
What is mimicry?

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8

Ans 3:

Class : Class 9

Ans 4:

Class : Class 7
The answer D is correct. Magnetic field moves from North to South, and if you follow the direction of the compasses, you will see that this theory is true.

Ans 5:

Class : Class 10
The correct and is D as the magnetic field moves from North to south

Ans 6:

Class : Class 9

Ans 7:

Class : Class 10

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 6
the answer will be both a and b

Ans 3:

Class : Class 7
no because what will u do of zero u have to

Ans 4:

Class : Class 7
i think its C

Ans 5:

Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.

Ans 6:

Class : Class 6

Ans 7:

Class : Class 10
GIVEN ANSWER IS NOT CORRECT AS A IS THE CORRECT ANSWER

Ans 8:

Class : Class 7
I agree with Aritroray the answer should be C

Ans 9:

Class : Class 6
it is simple that while measuring, at first you eye must be vertically above 0

Ans 10:

Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.

Ans 11:

Class : Class 6
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Ans 12:

Class : Class 10

Ans 13:

Class : Class 7
No as it causes a parallax error. It should be option A. If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions. You will see that, the measurement varies slightly every time. That's why option A is correct.

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