National Science Olympiad Forum By SOF Olympiad Trainer - Page 432

# User Forum

Subject :NSO    Class : Class 3

Class : Class 3
Usain Bolt

Class : Class 3
Ussain Bolt

## Ans 3:

Class : Class 3
Ussain Bolt

Subject :NSO    Class : Class 3

Class : Class 3
B

Class : Class 5

Class : Class 3
B

Class : Class 7
D

## Ans 5:

Class : Class 5
d is the answer

Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Class : Class 6
asdfghjkl;

Class : Class 6
wrong

Class : Class 7
asdfghjklz

Class : Class 7

Class : Class 7
C

Class : Class 6

Class : Class 6

Class : Class 6

Class : Class 7
it is a!!!!

## Ans 10:

Class : Class 6
Answer A is correct

Subject :NSO    Class : Class 6

Class : Class 7
C

## Ans 2:

Class : Class 6

Subject :NSO    Class : Class 6

## Ans 1:

Class : Class 7
In a field research, some rats were kept in a wheat field. Their presence in the wheat field would affect the number of wheat plants over a certain period of time.Rats burrow in the soil of wheat field and cause damage to the crop roots. So, the number of wheat plants would fall over a period of time. Rats also feed on ripening ear heads and ripened grains. So, their population would increase fast. The more they are in number, the more damage they would cause to the plant roots, and the more grains they would eat.So, the number of wheat plants in the field would keep decreasing.The following graph would show the change in the number of wheat plants correctly:In the above graph, the number of wheat plants is constantly falling over a period of time. Hence, the right answer is Option C.

## Ans 2:

Class : Class 10
C,as the wheat plants decrease in number.

## Ans 3:

Class : Class 6

Subject :NSO    Class : Class 5

## Ans 1:

Class : Class 6
but others also produce heat energy?

## Ans 2:

Class : Class 7
It will be option D. It will be D as it can be understood from the pictures that S is a room heater which is run by electric. Heat comes out of it. It is therefore used to keep our surroundings warm. Thank you .

## Ans 3:

Class : Class 7

Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 5

Class : Class 7

Class : Class 5

## Ans 3:

Class : Class 5
Answer is c because coal and petroleum can be finished but wind will never get finished

## Ans 4:

Class : Class 9
It is C , guys....

## Ans 5:

Class : Class 5
coal and petroleum are non renewable sourcesbut wind is made up of air and air contains so many gases .Therefore wind cannot be exhausted so wind is renewable resources

## Ans 6:

Class : Class 5
C

Subject :NSO    Class : Class 5

Class : Class 5

## Ans 2:

Class : Class 5
wrong answer as the person should tilt his head sightly forward.

Class : Class 8

Class : Class 4

## Ans 5:

Class : Class 8
In option c, the person must bend head forward to let blood darin out through nose and not down the throat. So option c is wrong.Also sitting is better than lying, as if nose is above heart that reduces the pressure, so option C is terribly wrong

## Ans 6:

Class : Class 5
person should bend forward...wrong answer