National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
b

Ans 2:

Class : Class 4
The answer is gibbous moon.

Ans 3:

Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
a

Ans 2: (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.


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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 3
aayman please can you come online

Ans 2:

Class : Class 3
Drying is the answer From aayman

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Subject :NSO    Class : Class 8

To every action there is always an equal and opposite reaction. Which of the following statements is correct regarding this?

A The buggy pulls the horse backward just as hard as the horse pulls the buggy forward. Both of them would not move forward if surface is frictionless.
B The horse pulls the buggy forward slightly harder than the buggy pulls the horse backward, so they move forward.
C The horse can pull the buggy forward only if the horse weighs more than the buggy.
D None of these


Does anybody know the solution?

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.

The buggy pulls the horse backward just as hard as the horse pulls the buggy forward. Both of them would not move forward if surface is frictionless. 


Ans 2:

Class : Class 8
Ans.- (A) The buggy pulls the horse as backward just as hard the horse pulls the buggy forward. According to the IIIrd law of NLM( Newton's Laws of Motion), the action and reaction force takes place in two different bodies, in different direction , but of the same magnitude.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
EASY PEASY LEMON SQUEEZY!

Ans 3:

Class : Class 6

Ans 4: (Master Answer)

Class : Class 1

The correct answer is B.

In the given Venn diagram X, Y and Z represent vitamin D, vitamin E and vitamin K, respectively. Deficiency of vitamin A causes night blindness and deficiency of vitamin C causes scurvy. Pellagra is caused by deficiency of vitamin B3. Vitamin B is a group of several vitamins like B1, B2, B3, B6, B12 and folic acid and is known as vitamin B complex.


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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 3
D

Ans 2:

Class : Class 4
d

Ans 3: (Master Answer)

Class : Class 1

The correct answer is D.

X is oesophagus with no change in amount of undigested food. Y is stomach and Z is small intestine with decreasing amount of undigested food and P is large intestine as no further digestion occurs here.


Ans 4:

Class : Class 4

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Subject :NSO    Class : Class 9

A unicellular protist X, which has contractile vacuole to remove excess intracellular water, was placed in salt solution of increasing osmolarity. The given graph shows the rate of contraction of vacuole to pump out excess water against osmolarity of solution.
Select the option that gives the correct explanation of the data.


A In an isotonic solution there is no diffusion of water in or out of the X, so the contraction rate is zero.
B At higher osmolarity, more salt diffuses into X, therefore lower rates of contractions are required.
C The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases.
D The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP.


what s the answer

Ans 1:

Class : Class 9
the concentration of a solution expressed as the total number of solute particles per litre.

Ans 2:

Class : Class 9
what is osmolarity

Ans 3: (Master Answer)

Class : Class 1

The answer is C

The rate of contraction increases as osmolarity decreases because amount of water entering X by osmosis increases. 


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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
1+1=2. 2+3=5. 5+5=10. 10+7=17. 17+9=26. 26+11=37. 37+13=50. 50+15=65. 65+17=82 82+19=101 1,3,5,7,9,11, and so on are added to get the next number in the pattern

Ans 2:

Class : Class 5
HELLO ANYONE who appeared for CLASS V - IGKO .. Can you please share the question paper for IGKO Class 5 conducted on 11th Sep and 25th Sep please please share on email ahkhan00@yahoo.com or whatsapp - 9713018111

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