National Science Olympiad Forum By SOF Olympiad Trainer - Page 480

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Subject :NSO    Class : Class 6

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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

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7

Ans 2:

Class : Class 6
but others also produce heat energy?

Ans 3:

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 .

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
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 2:

Class : Class 5
C

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 7
Answer is C.

Ans 6:

Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
person should bend head slightly forward to not let the blood go through 6he throat. Even book is saying that. Answer Cis very wrong

Ans 2:

Class : Class 8

Ans 3:

Class : Class 4

Ans 4:

Class : Class 5

Ans 5:

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

Ans 6:

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

Ans 7:

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

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B

Ans 2:

Class : Class 7
B

Ans 3:

Class : Class 7

Ans 4:

Class : Class 9
C

Ans 5:

Class : Class 3
A

Ans 6:

Class : Class 3
B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
A is correct . Check on google

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6

Ans 4:

Class : Class 6
The relationship is Rabi:Kharif

Ans 5:

Class : Class 9
I think the relationship is ( Kharif Crop: Kharif Crop ). Then, option A cannot be correct as Barley is a Rabi crop while Maize is a Kharif crop.

Ans 6:

Class : Class 6

Ans 7:

Class : Class 9

Ans 8:

Class : Class 5
The relationship is Rabi crop: kharif crop.

Ans 9:

Class : Class 3
The answer is correct. The relation is rabi : kharif .

Ans 10:

Class : Class 9
I think the relationship is Kharif Crop: Kharif Crop. Then, option A cannot be correct as Barley is a Rabi crop while Maize is a Kharif crop.

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8
both B

Ans 3:

Class : Class 9
B and D both are incorrect.

Ans 4:

Class : Class 3
B and D are incorrect

Ans 5:

Class : Class 5
B

Ans 6:

Class : Class 3
B & D

Ans 7:

Class : Class 3
D is incorrect.But B is also incorrect as both kerosene and syrup are liquid.

Ans 8:

Class : Class 3
B & D

Ans 9:

Class : Class 8
why did not you send right answer clarification or correct options

Ans 10:

Class : Class 8
B

Ans 11:

Class : Class 2
both B and D are incorrect

Ans 12:

Class : Class 5
Syrup is not a gas.

Ans 13:

Class : Class 9
B & D

Ans 14:

Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 9
A

Ans 2:

Class : Class 2
Crecent to Newmoon to Crecent to Full Moon. Answer is A

Ans 3:

Class : Class 6
Huh i got it wrong . it was v easy

Ans 4:

Class : Class 8
Answer is A

Ans 5:

Class : Class 5
answer is A not B

Ans 6:

Class : Class 3
A

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