National Science Olympiad Forum By SOF Olympiad Trainer - Page 691

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
It is C.. Cuz the fulcrum is at one end..

Ans 2:

Class : Class 9
D

Ans 3:

Class : Class 3
It's A, as in a hammer, the fulcrum, that is the place were the head of the hammer and rod of the hammer meet is in center, the load which is the nail is on one end and the effort we apply is on the other end

Ans 4:

Class : Class 7
It shows that the effort is in between and load and fulcrum are at the ends .

Ans 5:

Class : Class 8

Ans 6:

Class : Class 7
It should be both a

Ans 7:

Class : Class 10
It will not be A because in first class lever the fulcrum lies between load and effort but in hammer effort lies between fulcrum and load

Ans 8:

Class : Class 9
I meant c

Ans 9:

Class : Class 9
A means A. Aarya you are right

Ans 10:

Class : Class 6
It is A

Ans 11:

Class : Class 6

Ans 12:

Class : Class 6
its definitely a

Ans 13:

Class : Class 8

Ans 14:

Class : Class 7
should be A

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 10
Mirage is an optical illusion caused due to refraction of light.

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
the correct answer is C

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
ans is c

Ans 4: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 5:

Class : Class 3
The correct answer is c

Ans 6:

Class : Class 4
The answer is C

Ans 7:

Class : Class 5
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 8:

Class : Class 9
Aarush , there will be not enough plants to feed so many water insects . So, at a particular time all plants will finish . So , there will be nothing left for the water insects so they will also die !

Ans 9:

Class : Class 5
C

Ans 10:

Class : Class 4

Ans 11:

Class : Class 7
correct answer is C

Ans 12:

Class : Class 8
The correct answer is C because if organism X wipes out all tadpoles in the community, then water insects' population grows with nothing to eat them. The small fish die because they have nothing to eat, and soon the big fish die too.

Ans 13:

Class : Class 4
In the given food chain, tadpole feeds on water insect and in turn is eaten by small fish. If population of tadpole will decline with time then small fish population will also decrease as former is the food of later. On the other hand, water insect population will be positively affected because in the absence of predator prey population reproduces and flourishes.

Ans 14:

Class : Class 6

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 3
Answer is D because at night plants take in oxygen and give out carbon-di-oxide whereas we humans always take in oxygen and give out carbon-di-oxide.

Ans 3:

Class : Class 3
We Don't know that plants breath oxygen in night

Ans 4:

Class : Class 5
A

Ans 5:

Class : Class 8
Sorry ,answer is A .I gave wrong explanation why .You have told arerespectively, so gas 1 is carbon dioxide and gas 2 is oxygen.You have given the order as 1 and 2 i.e. carbon dioxide and oxygen.So ,we will say it as 2 and 1 i.e oxygen and carbon dioxide .Hence answer is A.

Ans 6:

Class : Class 8
ans is A as the order of gases will not change

Ans 7:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
ANS should be a

Ans 2:

Class : Class 6
why?

Ans 3:

Class : Class 9
why

Ans 4:

Class : Class 3
understood

Ans 5:

Class : Class 7

Ans 6:

Class : Class 8

Ans 7:

Class : Class 4
Figure A can be folded horizontally, figure B can be folded diagonally, figure D can be folded vertically to get their mirror images whereas figure C is asymmetric, so the odd one out is figure C

Ans 8:

Class : Class 3
nonsense question

Ans 9:

Class : Class 9
The images given in Options A, B and D are symmetrical images. That means all three have at least one line of symmetry. Line of symmetry is any line drawn through the image which divides the image into two exactly equal parts, and these parts are mirror images of each other. A.The part above the red line (line of symmetry) and the 7part below the red line are mirror images of each other.7410`1 B.The parts on both sides of the red line (line of symmetry) are mirror images of each other. C.There can be no line of symmetry that can divide this image into two equal parts which are mirror images of each other. D.The part on the left side of the red line (line of symmetry) and the part on the right side of the red line are mirror images of each other. Hence, Option C is the odd one out.

Ans 10:

Class : Class 9

Ans 11:

Class : Class 3
Answer is asymmetrical figure, because all the other figures are symmetrical.

Ans 12:

Class : Class 3
i cant understand the second question c] or b]?

Ans 13:

Class : Class 7

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
correct answer is C

Ans 2:

Class : Class 6
C

Ans 3:

Class : Class 9
The answer is C

Ans 4:

Class : Class 5
C

Ans 5:

Class : Class 9
C

Ans 6:

Class : Class 4
explain please

Ans 7: (Master Answer)

Class : Class 1

The correct answer is C.


Ans 8:

Class : Class 4
I. This is so EZ.t can be c as N is on the top and S is down plus when the north recives cold it is hot in the south and when the south is cold it is hot in the north

Ans 9:

Class : Class 4
D is correct

Ans 10:

Class : Class 6
d

Ans 11:

Class : Class 5
how do you all know the correct answer is 'C' when everything seems correct.

Ans 12:

Class : Class 7
please give explanation Admin.

Ans 13:

Class : Class 5
please explain how is it c?

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
good question sligjhtly tricky

Ans 2:

Class : Class 5

Ans 3:

Class : Class 9
OH mene to d kiya tab laga ki sab wrong the.oh my god now acinfusing yar

Ans 4:

Class : Class 6

Ans 5:

Class : Class 4
iojkbn

Ans 6:

Class : Class 9
c

Ans 7:

Class : Class 4
Answer a

Ans 8:

Class : Class 7
All of them are incorrect so the answer is D

Ans 9:

Class : Class 10
Yes, it is true, we can compare the movement to the joint mentioned as "P" with that of a joystick. It is a ball-socket joint, and it is found in the shoulders and the hips.

Ans 10:

Class : Class 5
The correct answer is A) according to SOF

Ans 11:

Class : Class 1
The correct ans is A.

Ans 12:

Class : Class 5
Nice question

Ans 13:

Class : Class 6
EASY. It is a). FOund it very quickly. I wonder why many of you put c)

Ans 14:

Class : Class 6
correct answer is supposed to be C. But according to SOF it is A.

Ans 15:

Class : Class 5
Correct answer is C

Ans 16:

Class : Class 7
But a is the answer .

Ans 17:

Class : Class 9

Ans 18:

Class : Class 5
the answer is a but i did it c

Ans 19:

Class : Class 8
And the question said to find the incorrect option! So a.

Ans 20:

Class : Class 4
D

Ans 21:

Class : Class 9
It's simple

Ans 22:

Class : Class 7
WTH?

Ans 23:

Class : Class 10
Soumya raj is correct answer should be c as ball and socket joint is only found in legs and arms and it is definitely not found in the skull .

Ans 24:

Class : Class 4
p is not pivot joint but a ball and socket joint but according to me c is the correct ans

Ans 25:

Class : Class 5
actually the picture P is wrong . they want to express it as pivot joint.

Ans 26:

Class : Class 5

Ans 27:

Class : Class 9
its a

Ans 28:

Class : Class 8
The correct answer is a but i did it wrong... (i did ans C)

Ans 29:

Class : Class 7
I did it c but according to SOF, it is a.

Ans 30:

Class : Class 6
Soumya raj is correct

Ans 31: