National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
The correct answer is D. In a transverse wave the direction of the movement of the particle is perpendicular to direction of motion of the wave. So, over here, when we move the end Q from left and right , it will produce a transverse wave,. You can check it by observing it from the top.

Ans 2: (Master Answer)

Class : Class 1

The correct answer is D

In transverse wave, vibration of a wave is perpendicular to its direction of propagation of wave.


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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2: (Master Answer)

Class : Class 1

The correct answer is A.

Sugar syrup is neutral and hence the colour of blue litmus and red litmus remains unchanged. Tamarind juice is acidic, so blue litmus turns red but red litmus does not change its colour. Lime water and soap solution are basic in nature which turn red litmus blue whereas blue litmus remains unchanged.


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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Fish Y will be least affected as it is camouflaging with the sea weeds. Fish Y can easily escape from the predator by blending with the surrounding environment.


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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
It is cooling towards room temperature so it does not solidify since the freezing point is below room temperature.

Ans 2:

Class : Class 7
I think b is correct because there is no solidification

Ans 3:

Class : Class 7
i think b is correct

Ans 4:

Class : Class 7
Three states - gas , liquid & solid When hot water temp is going down it will be ultimate become solid ie ice But before becoming ice temp will stagnant for some time where in both states liquid & solid co-exist==> some part of liquid is in ice form. X is the same state where in solid and liquid will co-exist. Hence option 4 is correct(solidification& evaporation) Note: Could not attach gif .It would have made it more clear.

Ans 5:

Class : Class 6
why?

Ans 6:

Class : Class 8
It cools towards room temperature so it does not freeze

Ans 7:

Class : Class 6
b is the correct answer

Ans 8:

Class : Class 7
B is the correct answer

Ans 9:

Class : Class 8
Also freezing and melting point of water is 0 degrees celsius

Ans 10:

Class : Class 7
i think b is the correct answer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
The answer is gibbous moon.

Ans 2:

Class : Class 4
b

Ans 3:

Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.

Both plants ‘c’ and ‘d’ bear fruits. This means they are flowering plants as only flowers change into fruits. Plant ‘c’ grows in water i.e., it is an aquatic plant but plant ‘d’ does not grow in water thus, it is a nonaquatic plant. Hence 'W' and 'X' represent plant ‘c’ and ‘d’ respectively.


Ans 2:

Class : Class 4
A

Ans 3:

Class : Class 4
A

Ans 4:

Class : Class 5
a

Ans 5:

Class : Class 4
a is right

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Subject :NSO    Class : Class 8

There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this?

(i) The connections of the circuit Q may be loose.
(ii) The liquid in Q may have small conductivity.
(iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

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


I don't understand (iii)

Ans 1: (Master Answer)

Class : Class 1

The correct answer is B

In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:

1. The liquid in Q may have small conductivity. 

2.  Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P


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Subject :NSO    Class : Class 4
Hi

Ans 1: (Master Answer)

Class : Class 1

Plaese mention your query


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
Well shiven

Ans 2:

Class : Class 4
aayman please can you come online

Ans 3:

Class : Class 3
Drying is the answer From aayman

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