National Science Olympiad Forum By SOF Olympiad Trainer - Page 638

# User Forum

Subject :NSO    Class : Class 3

Class : Class 5
b

Class : Class 5
B

Class : Class 3
B

## Ans 4:

Class : Class 3

Subject :NSO    Class : Class 4

Class : Class 4
not sure

## Ans 2:

Class : Class 7
Can you tell the answer to this question

## Ans 3:

Class : Class 4
The Correct Answer Is A

Class : Class 4
Its D

Class : Class 7

## Ans 6: (Master Answer)

Class : Class 1
The correct answer is A.

Class : Class 9
d is the answer

Class : Class 3

## Ans 9:

Class : Class 7
it's 'd' or 'a'..... not sure

Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

Class : Class 4

## Ans 2:

Class : Class 6
i cant count please give solution

## Ans 3:

Class : Class 5
This answer should be three.

## Ans 4:

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

Subject :NSO    Class : Class 6

Class : Class 9
I meant c

## Ans 2:

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

Class : Class 8

Class : Class 7
should be A

Class : Class 6
It is A

Class : Class 9
D

Class : Class 8

## Ans 8:

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

Class : Class 6

## Ans 10:

Class : Class 7
It should be both a

## Ans 11:

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 12:

Class : Class 8
A means A. Aarya you are right

## Ans 13:

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

Subject :NSO    Class : Class 8

## Ans 1:

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

Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

## Ans 1:

Class : Class 6

Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 4

## Ans 1:

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 2:

Class : Class 4
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## Ans 3:

Class : Class 3
The correct answer is c

## Ans 4:

Class : Class 7
correct answer is C

Class : Class 4
The answer is C

## Ans 6:

Class : Class 8
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 7:

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.

Class : Class 4

Class : Class 6

Class : Class 5
C

Class : Class 4

## Ans 12:

Class : Class 4
the correct answer is C

## Ans 13: (Master Answer)

Class : Class 1
The correct answer is C.