National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2:

Class : Class 3

Ans 3: (Master Answer)

Class : Class 1

The correct answer is C

Gases do not have a fixed shape and are compressible, liquids also do not have fixed shape but cannot be compressed as they have a fixed volume. Solids have fixed shape, fixed volume and can either float or sink in water depending upon their density.


Ans 4:

Class : Class 3
c

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
The answer is B

Ans 2:

Class : Class 3
B

Ans 3: (Master Answer)

Class : Class 1

The correct answer is B - Gibbous


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
I AM IN CLASS 10TH BUT IT IS WRITTEN WRONG SO SORRY [IT IS WRITTEN CLASS 3RD]

Ans 2:

Class : Class 4
i am a genius

Ans 3:

Class : Class 4
Aq1wwwwwwwwwwwwwww

Ans 4:

Class : Class 4
TRH J3we]ART68 [PL;[0]'1;LPO; [KOREN]YUL

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.

Count the number of total balls = 21
Count the number of crossed balls = 6
So, the subtraction sentence will be 21 - 6.
Now make the subtraction sentences for all options:
(A) 2 tens 1 one - 6 ones = 21 - 6 
(B) 2 tens 2 ones - 6 ones = 22 - 6 
(C) 2 tens - 6 ones = 20 - 6
(D) 2 tens 3 tens - 6 ones = 23 - 6


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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

The correct answer is B.

Total Smileys = 56
Green Smileys = 8
Fraction of Green Smileys = 8/56 = 1/7


Ans 2:

Class : Class 3
It will be 8/56,every answer is wrong because its a proper fraction so 8/56=8/56

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
but seeds can reproduce through stem , leaves , and root too , can't they ???

Ans 2:

Class : Class 6
but in some plants ther is no flower then also they can reproduce in a different manner

Ans 3:

Class : Class 5
I think answer is (C) as flowers changes into fruit and fruit changes into seed.

Ans 4:

Class : Class 5
Stem is also correct for some plants like mint ,

Ans 5:

Class : Class 4
I think it is seed only because if the other parts will no be there than how the previous plant will grow

Ans 6: (Master Answer)

Class : Class 1

The correct answer is C

Flower changes into fruits and fruit bears seeds. Seeds give rise to new plants when sown into soil.


Ans 7:

Class : Class 5
Flower attract the insects for pollination,so the answer is C

Ans 8:

Class : Class 5
Think the correct ans'rs C Cause a flower changes into a fruit in the fruit then bears seads which give rise to new plants on being down in soil. That's what I think don't know if it is right!!!

Ans 9:

Class : Class 5
It is not c because new plants can rise by vegetative reproduction which are not by seeds.It is by roots, stem or leaves. what, in case of byrophyllum plant.

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Subject :NSO    Class : Class 6

Four rods of equal length and thickness but of different materials are coated with wax in the same manner. They are fixed to a trough containing hot water. The given diagram illustrates what happens to the wax on each rod after five minutes.

What can you conclude from the given diagram?
(i) The aluminium rod conducts heat better than the brass rod.
(ii) The aluminium rod conducts heat better than the copper rod.
(iii) The glass rod conducts heat better than the copper rod.
(iv) The wax on the copper rod melts faster than the wax on the brass rod.

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


Ans 1:

Class : Class 6
It must be 'B' not 'A'

Ans 2:

Class : Class 3
the wax has been applied all over the rod. copper has the least amount of wax on it. So it is the best conductor of heat whereas the glass rod has the most amount of wax thus it is the weakest conductor of heat.Thus,the option "A" is the correct answer

Ans 3:

Class : Class 6
I too agree with you .It's B and not A

Ans 4:

Class : Class 6

Ans 5:

Class : Class 7
ACCORDING TO ME THE CORRECT ANSWER IS B , FIRST WE HAVE TO UNDERSTAND THE PICTURE AND THEN ANSWER

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