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 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
How to solve this problem. Please explain

Ans 2:

Class : Class 7

Ans 3:

Class : Class 5

Ans 4:

Class : Class 7
Please explain the answer

Ans 5:

Class : Class 5
How to solve this problem. Please explain.

Ans 6:

Class : Class 6
Yes.Please explain the reason.

Ans 7:

Class : Class 4
How

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Subject :NSO    Class : Class 5

Select the correct sequence of words to fill the blanks in the following sentences.

a - 1 fibres do not absorb sweat.
b - Wool is obtained from 2
c - Insects like 3 damage silk and woollen clothes.

            1                      2                      3
APolyester          Cow                Cockroach
BSilk                  Sheep               Butterfly
CWoollen           Plant                 Moth
DNylon              Sheep                Silver fish


Please sir I found this a very dicey question. Do silver fish really damage silk and woolen clothes?

Ans 1:

Class : Class 5
Option no. D is correct. This is because as nylon is a synthetic fibre , it doesn't absorb sweat and also sheep is the animal from whom wool is obtained, and yes silverfish do damage silk and woollen clothes.

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
its "a"

Ans 2:

Class : Class 7
if you magnetise a material for eg if you magnetise a piece of iron with the south pole of a magnet , the side which you are magnetising will be north

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
C is also correct

Ans 2:

Class : Class 8
The answer should be B

Ans 3:

Class : Class 7
Sorry A is also correct

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Subject :NSO    Class : Class 6

Collecting rainwater and storing it for later use is called rainwater harvesting. Which of the following statements are not true for the technique of rooftop rainwater harvesting?
(i) Rainwater is allowed to go down the roadside drains.
(ii) Rainwater from roof top is collected in storage tanks.
(iii) The collected rainwater needs to be filtered as it contains soil.
(iv) This practice reduces the amount of ground water available to us.

A(i) and (ii) only
B(ii) and (iii) only
C(iii) and (iv) only
D(i) and (iv) only


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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
There were all sparrows but six' means that six birds were not sparrows but only ... 6. This is possible when there are 3 sparrows, 3 pigeons and 3 ducks i.e. 9 birds in all.

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