National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
Please give solution

Ans 2:

Class : Class 6
HOW MANY SQUARES ARE THERE AND GIVE SOLUTION

Ans 3:

Class : Class 5
This answer should be three.

Ans 4:

Class : Class 6
i cant count please give solution

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
should be A

Ans 2:

Class : Class 7
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 3:

Class : Class 7
It should be both a

Ans 4:

Class : Class 8

Ans 5:

Class : Class 6

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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

Ans 1:

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

Ans 2:

Class : Class 3
The correct answer is c

Ans 3:

Class : Class 4

Ans 4:

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 5:

Class : Class 5
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 6:

Class : Class 5
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 7: (Master Answer)

Class : Class 1
The correct answer is C.

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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 4
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 4:

Class : Class 5

Ans 5:

Class : Class 4
ans is A as the order of gases will not change

Ans 6:

Class : Class 5
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 3
understood

Ans 3:

Class : Class 4

Ans 4:

Class : Class 3
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 5:

Class : Class 3
nonsense question

Ans 6:

Class : Class 5
why

Ans 7:

Class : Class 3

Ans 8:

Class : Class 6
why?

Ans 9:

Class : Class 3
ANS should be a

Ans 10:

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

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