National Science Olympiad Forum By SOF Olympiad Trainer - Page 293

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
its A

Ans 2:

Class : Class 6

Ans 3:

Class : Class 3

Ans 4: (Master Answer)

Class : Class 1

(C): The colour of human blood is Red but Red means Black.


Ans 5:

Class : Class 3
But red means white ?? But red means white ??

Ans 6:

Class : Class 3

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

D

Bird P has a hooked beak, which is suitable for traring and eating flesh of animals.
Bird Q has a pouch under the beak, which is suitable for gulping the whole fish.
Bird R has long pointy beak, which is suitable for drinking nectar of flowers.
Bird S has the short beak, which is suitable for eating seeds and grains.


Ans 2:

Class : Class 5
C

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

B

P - Ant, Q - House fly, R - Honeybee, S - Cockroach
A rubbish dump mostly has ants, flies and cockroaches.


Ans 2:

Class : Class 5
B

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2: (Master Answer)

Class : Class 1

B

It takes 16 days for the animal X to become an adult after it is hatched. The shortest time-span is of egg stage, that is of 4 days.


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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 4
B

Ans 2:

Class : Class 4

Ans 3:

Class : Class 4
b

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 5

Read the given statements and select the correct option.
Statement 1: Naphthalene balls kept in woollen clothes reduce in size after sometime.
Statement 2: Solid naphthalene balls change into gas due to the warmth of woollen clothes.

ABoth statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
CStatement 1 is correct but statement 2 is incorrect.
DBoth statements 1 and 2 are incorrect.


Woolen clothes do not produce warmth, they only prevent loss of heat. Therefore, statement 2 is incorrect. Hence, the correct answer should be C.

Ans 1:

Class : Class 6
Anant is right. Warm clothes do not generate heat.

Ans 2:

Class : Class 9
nahi

Ans 3:

Class : Class 9
WOOLLEN CLOTHES DONT HAVE WARMTH THEY CANT CHANGE TEMPRATURE BY THEMSELVES THE CORRECT ANSWER SHOULD BE C

Ans 4:

Class : Class 4
Warm clothes do not generate heat but also do not allow cool air to enter hence creating warmth for the naptholine balls

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
(Master Answer)The correct answer is D.

Ans 2:

Class : Class 6
babuski

Ans 3: (Master Answer)

Class : Class 1

D

When the water of beakers X and Y will be mixed, the final temperature will be somewhere between 50°C-80°C. So the temperature will be < 80°C after an hour.


Ans 4:

Class : Class 6

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Subject :NSO    Class : Class 9

Ans 1: (Master Answer)

Class : Class 1

D


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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
answer is D.

Ans 2:

Class : Class 3
the ans is D. second inside first inside second.

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