National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer is c

Ans 2:

Class : Class 2

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Subject :NSO    Class : Class 7

Refer to the given figure of body cells and select the incorrect statements regarding X, Y and Z.

(i) Y maintains pH of blood.
(ii) Z is an important part of our immune system.
(iii) Z plays a key role in transporting gases in the blood.
(iv) The pigment present in X absorbs oxygen and transports it to the cells all over the body.

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


please explain

Ans 1:

Class : Class 8
in this case picture depict is wrong . WBC should be smaller than RBC in size .

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
answer d

Ans 2:

Class : Class 4
d

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Subject :NSO    Class : Class 10

A small conducting rod of length l, moves with a uniform velocity v in a uniform magnetic field B as shown in figure.


A The end X of the rod becomes positively charged.
B The end Y of the rod becomes positively charged.
C The entire rod is unerringly charged.
D The rod becomes hot due to joule heating.


By Fleming's right-hand rule, current flows from X to Y, but which end actually receives the extra positive charge?

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
See, Y is feeding on x which means that population of X would definitely decrease. This means that eater of water beetle has decreased. This indicates that population of water beetle will increase. This means more food for fro with beetle. with g. Due to large amount of food frogs' population will also increase parallelly. In this way B would be correct . Sorry for too long answer.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
C

Ans 2:

Class : Class 6

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Subject :NSO    Class : Class 7

Two containers X and Y are filled with equal amount of hot water and the temperature of the water in the containers is measured with a thermometer some time later. It is observed that container X has a much lower temperature than container Y. Which of the following are the possible reasons?
(i) Container X is black and container Y is silver.
(ii) Container X has a lid and container Y is not covered.
(iii) Container X is made of steel and container Y is made of clay.

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


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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
it should be b because they have asked in the increasing order

Ans 2:

Class : Class 8
The question asks the increasing order.. answer is B

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 7

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