National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
C) x y

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Subject :NSO    Class : Class 6

Read the given passage where some of the words have been italicised.
Cotton plant is annual shrub. It grows best in cold climate. Black soil is best suited for the cultivation of cotton plant. The stems of cotton plant are called cotton bolls. The seeds with cotton fibres are picked from the cotton bolls by hand. After picking the fibres are separated from the seeds by a process called combing.
Select the correct option regarding this.

A Annual should be replaced by biennial.
B Cold should not be replaced as it is correctly mentioned.
C Black should be replaced by yellow and stems should be replaced by fruits.
D Combing should be replaced by ginning.


answer is D

Ans 1:

Class : Class 6
Ginning is a process used to separate cotton fibres from seeds while combing is the process of disentangling fibres

Ans 2:

Class : Class 6
correct answer should be d

Ans 3:

Class : Class 6
yes combing should be replaced because combing is the process of of straitning cotton fibers

Ans 4:

Class : Class 6
ans is D

Ans 5:

Class : Class 6
D is correct, combing should be replaced by ginning

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

Ans 2:

Class : Class 6
Our body is made of mostly made of impure water which is a good conductor of electricity. Our body also has a lot of metallic minerals like iron which conduct electricity.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

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Subject :NSO    Class : Class 6

Which of the following statements are correct?
(i) Human body is a good conductor of electricity.
(ii) The air gap surrounding an electric circuit acts as a conductor.
(iii) Silver conducts electricity better than any other metal.
(iv) When electricity lights up a bulb, no heat is produced.

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


Can someone explain how the human body is a good conductor of electricity?

Ans 1:

Class : Class 6
because our body contains minerals like iron and has a large quantity of un - distilled water

Ans 2:

Class : Class 6
actually our human body consists 70% of water and if we touch electricity they are conducted through our body to either to another person or to any metal or to directly the ground.

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Subject :NSO    Class : Class 6

Label the dry cell in the correct order.


A (i) Carbon and Manganese dioxide mixture, (ii) Carbon rod, (iii) Ammonium chloride
B (i) Carbon rod, (ii) Ammonium chloride, (iii) Zinc container
C (i) Ammonium chloride, (ii) Zinc container, (iii) Carbon rod
D (i) Zinc container, (ii) Carbon rod, (iii) Carbon and Manganese dioxide mixture


The correct answer is C as the part labeled (i) is ammonium chloride, (ii) is zinc container and (iii) is carbon rod.

Ans 1:

Class : Class 6
yes

Ans 2:

Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
B is the correct answer

Ans 2:

Class : Class 6
I think B is the correct answer

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