National Science Olympiad Forum By SOF Olympiad Trainer - Page 607

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 7
w4aestdryuvghibj

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
Answer D look like correct too

Ans 2:

Class : Class 10
But what is the explanation?

Ans 3:

Class : Class 8
No, Answer D is not correct. They are talking about red, blue, and green lights not red, blue, and green pigments in a leaf. Red and blue lights are efficient in photosynthesizing and the green pigment is also efficient in photosynthesizing. Here, they are talking about lights, not pigments in a leaf.

Ans 4:

Class : Class 7
Got it as green color reflected thus will not be used for photosynthesis

Ans 5:

Class : Class 1
How???????

Ans 6:

Class : Class 7
What????!!How?????!!!Please answer!!

Ans 7: (Master Answer)

Class : Class 1
The correct answer is C.

Ans 8:

Class : Class 8
Pls explainI agree with shreyansh2010

Ans 9:

Class : Class 9
Answer C is correct because Red and Blue light are absorbed and used for Photosynthesis . But in D it is written Green light is reflected ( correct ) but is used for Photosynthesis ( incorrect )

Ans 10:

Class : Class 1
Thanks for the answer. ......

Ans 11:

Class : Class 8

Ans 12:

Class : Class 5
howwwwwwwww pls 4my sanity tell me

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
i have got C

Ans 2: (Master Answer)

Class : Class 1
The correct answer is D.

Ans 3:

Class : Class 9

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5

Ans 2:

Class : Class 5

Ans 3:

Class : Class 7
B) West

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 6
this question is so hard

Ans 3:

Class : Class 6
Observe the given diagram carefully which shows a reflex arc. The diagram is show a finger touching the flame of the burning candle. The Sensory Neuron P takes the message of the burning finger to the Relay Neuron R in spinal cord. The Motor Neuron Q takes the message from the Relay Neuron R to the related muscle to act accordingly and pull the finger away. Now, if the orientation of Motor Neuron Q is changed (red arrow) and made as that of Sensory Neuron P, that means message from Motor Neuron Q will go from Muscle to the Relay Neuron R. Now, let’s check the following options to see what will happen: A.All voluntary movements of body including reaction to heat will stop. ----- Incorrect. Reaction to heat is an involuntary reflex response. It will stop if the orientation of Motor Neuron Q is changed. But voluntary movements of the body, which are in control of our brain, will go on. B.The sensory receptor will not get stimulus from the candle. ----- Incorrect. The orientation of Sensory Neuron P is still the same, so sensory receptors in spinal cord will continue to get the stimulus of heat from the candle. C.The motor organ will not be able to get instructions from the spinal cord. ----- Correct. The orientation of Motor Neuron Q has been changed, so instruction from spinal cord will not reach the motor organ (muscle). It will go from muscle to the spinal cord instead. D.None of these ----- Incorrect. Hence, the right answer is Option C.

Ans 4:

Class : Class 5
C is correct

Ans 5:

Class : Class 7

Ans 6:

Class : Class 5

Ans 7:

Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
The answer is C Because Tadpoles breath through gills but gills are not given in the grid

Ans 2:

Class : Class 5
C

Ans 3:

Class : Class 5
Ans- C

Ans 4:

Class : Class 5
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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2:

Class : Class 10
B

Ans 3:

Class : Class 5

Ans 4:

Class : Class 5
b

Ans 5:

Class : Class 6
b

Ans 6:

Class : Class 6
The explaination of this question is not complete.SOF please edit it.

Ans 7:

Class : Class 5
b

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 10
First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess

Ans 2:

Class : Class 10
in a much better way First we have to dig the ground. (v) Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i) Then we can add the waste we planed to throw in the pit. (vi) We have to then cover with grass so that the pit remains closed. (iii) Moisture is required for wastes to decompose. (iv) We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)

Ans 3:

Class : Class 6
option B

Ans 4:

Class : Class 10
in a much better way First we have to dig the ground. (v)| Then we spread sand on the floor of the pit so that the pit remains open for a longer time. (i)| Then we can add the waste we planed to throw in the pit. (vi) | We have to then cover with grass so that the pit remains closed. (iii) | Moisture is required for wastes to decompose. (iv) | We can later place red worms, as they are very good decomposers_ to speedthe decomposing proccess. (ii)|

Ans 5:

Class : Class 8
B

Ans 6:

Class : Class 6

Ans 7:

Class : Class 10

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 9
The answer is [A]

Ans 2:

Class : Class 5
aaa aaa aaa

Ans 3:

Class : Class 7
A

Ans 4:

Class : Class 4
Why not D

Ans 5:

Class : Class 7
A) Ball ‘b’ had the greatest impact on the ground.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
all are correct

Ans 2:

Class : Class 3
D

Ans 3:

Class : Class 6
ans is also D

Ans 4:

Class : Class 8
Answer is D

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