National Science Olympiad Forum By SOF Olympiad Trainer - Page 720

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8

Ans 3:

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

Ans 4:

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

Ans 5:

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 6:

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

Ans 7:

Class : Class 7
It should be both a

Ans 8:

Class : Class 8

Ans 9:

Class : Class 9
D

Ans 10:

Class : Class 6
It is A

Ans 11:

Class : Class 9
I meant c

Ans 12:

Class : Class 7
its definitely a

Ans 13:

Class : Class 7
should be A

Ans 14:

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

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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 5
ans is c

Ans 2:

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 3:

Class : Class 5
C

Ans 4:

Class : Class 4

Ans 5: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 6:

Class : Class 4
The answer is C

Ans 7:

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 8:

Class : Class 6

Ans 9:

Class : Class 3
The correct answer is c

Ans 10:

Class : Class 7
correct answer is C

Ans 11:

Class : Class 4

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 5
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

Ans 14:

Class : Class 4
the correct answer is C

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Subject :NSO    Class : Class 3

Ans 1:

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

Ans 2:

Class : Class 7

Ans 3:

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

Ans 4:

Class : Class 5
A

Ans 5:

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 6:

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 7:

Class : Class 3
A

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Subject :NSO    Class : Class 3

Ans 1:

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 2:

Class : Class 8

Ans 3:

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

Ans 4:

Class : Class 9
why

Ans 5:

Class : Class 6
why?

Ans 6:

Class : Class 6

Ans 7:

Class : Class 9

Ans 8:

Class : Class 9
ANS should be a

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 8

Ans 11:

Class : Class 3
nonsense question

Ans 12:

Class : Class 3
understood

Ans 13:

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

Ans 14:

Class : Class 8

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Subject :NSO    Class : Class 4

Ans 1:

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

Ans 2:

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 3: (Master Answer)

Class : Class 1

The correct answer is C.


Ans 4:

Class : Class 6
d

Ans 5:

Class : Class 4
D is correct

Ans 6:

Class : Class 8
please give explanation Admin.

Ans 7:

Class : Class 4
no u DUMMIES! winter should be on the east side of the earth and summer on the west and Goutham this question is sooooo WRONG! and ur wrong Goutham

Ans 8:

Class : Class 6
C

Ans 9:

Class : Class 5
please explain how is it c?

Ans 10:

Class : Class 4
it also can be d explain how please admin cant understand

Ans 11:

Class : Class 9
C

Ans 12:

Class : Class 7
correct answer is C

Ans 13:

Class : Class 9
The answer is C

Ans 14:

Class : Class 5
C

Ans 15:

Class : Class 3
explain please

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
But a is the answer .

Ans 2:

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

Ans 3:

Class : Class 9
It's simple

Ans 4:

Class : Class 4
Answer a

Ans 5:

Class : Class 5
Correct answer is C

Ans 6:

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

Ans 7:

Class : Class 6
Soumya raj is correct

Ans 8:

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

Ans 9:

Class : Class 9
I think the answer is A

Ans 10:

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

Ans 11:

Class : Class 8
The question is asking to select the incorrect question, but option C is correct and option A is wrong so A is the correct answer

Ans 12:

Class : Class 5
Nice question

Ans 13:

Class : Class 4
cool question

Ans 14:

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

Ans 15:

Class : Class 5
but read the question... you have to select the incorrect ans

Ans 16:

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

Ans 17:

Class : Class 5
correct answer is supposed to be C. But according to SOF it is A.

Ans 18:

Class : Class 8
good question sligjhtly tricky

Ans 19:

Class : Class 4
D

Ans 20:

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

Ans 21:

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

Ans 22:

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

Ans 23:

Class : Class 5

Ans 24:

Class : Class 7
SOF is wrong . The answer should be C as Ball and socket joint is only found in arms and legs . It cannot come in the skull . Smita De is also absolutely right .

Ans 25:

Class : Class 7
WTH?

Ans 26:

Class : Class 9
its a

Ans 27:

Class : Class 4
iojkbn

Ans 28:

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

Ans 29:

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 30:

Class : Class 1
The correct ans is A.

Ans 31:

Class : Class 6

Ans 32:

Class : Class 4

Ans 33:

Class : Class 5

Ans 34:

Class : Class 9
c

Ans 35:

Class : Class 9

Ans 36:

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.

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