National Science Olympiad Forum By SOF Olympiad Trainer - Page 536

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Subject :NSO    Class : Class 6

Which of the following statements is correct ?
(i) The response of plant towards the Earth is called phototropism .
(ii) The ability of certain animals to blend with the surrounding, making them difficult to spot is called camouflage.
(iii) Whales and dolphins breathe in oxygen from water through gills.
(iv) Hibernation is an adaptation for escaping hot weather.

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


escaping hot weather is called aestivation . hibernation is escaping from cold weather .

Ans 1:

Class : Class 7
sof is wwwwwwwwwwwwwwwwwwwrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnngggggggggggggggggggggggggggggggggggggggggggg

Ans 2:

Class : Class 8
Yes none of the options are correct

Ans 3:

Class : Class 8
YES The correct answer is (A).

Ans 4:

Class : Class 8
Okay manvi

Ans 5:

Class : Class 7
THE CORRECT ANSWER IS (A)

Ans 6:

Class : Class 5
not a because The response of plant towards the sun is called phototropism

Ans 7:

Class : Class 9
here all the statements are wrong except 3rd statement

Ans 8:

Class : Class 9
here , statement 1 , 3

Ans 9:

Class : Class 7
Hibernation is done in winters not summers so OPTION A IS CORRECTTTTTT

Ans 10:

Class : Class 8
Option A is Wrong

Ans 11:

Class : Class 6
none of the options are correct as the only correct statement mentioned here is (ii)

Ans 12:

Class : Class 9
bot

Ans 13:

Class : Class 8
statement 4 is wrong and none of the options is correct as response of plants towards earth is called geotropism

Ans 14:

Class : Class 9
I WANT EXPLAINATION

Ans 15:

Class : Class 8
According to me Statement 2 is correct

Ans 16:

Class : Class 3
none of the options are correct

Ans 17:

Class : Class 9
Statement 4 is wrong because hibernation is done to escape cold weather not hot , so SOF is wwwwwwwwwwrrrrrrrrrrrrrrrrrrrooooooooooooooonnnnnnnnnnnnnnnngggggggggggggggggggg

Ans 18:

Class : Class 7
The answer is wrong

Ans 19:

Class : Class 9
option 4 if wrong. pls Chk soF other thn that all are correct .

Ans 20:

Class : Class 7
sof wrong ans there should be option like:only ii is correct

Ans 21:

Class : Class 7
THE CORRECT ANSWER IS A

Ans 22:

Class : Class 9

Ans 23:

Class : Class 8

Ans 24:

Class : Class 8
none of the answers are correct

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 7
The answer is correct, as when friction occurs, obviously, all of its properties will occur, even if not all of the properties are required. That's... how friction works.

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
All the properties friction are in use. Hence, the correct one option 'D'.

Ans 4:

Class : Class 7
The Options Are wrong I guess because only (i),(ii)and(iii) are in use

Ans 5:

Class : Class 5
The Options Are wrong because only 123 are in use.

Ans 6:

Class : Class 5
The Options Are wrong because only 123 are in use.

Ans 7:

Class : Class 8
It's not asking about which properties occur (which would be all of them), it's asking which are in use. And that's only 1, 2, and 3. So the options are wrong

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is C.


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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
B) 2 and 3

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1

Mass is the amount of matter present in an object whereas weight is the force exerted by the gravity on that object.

Now, the weight of an object, W = g X m, where 'g' is Earth's gravitational constant and 'm' is the mass of the object.

The weight of the object will remain constant as long as the mass of that object is not changing since 'g' is constant. However, the weight of an object can still be changed without changing the mass. This can be explained by the following example: Consider a helicopter with a mass, 'm'.

1. If the helicopter is accelerated towards the earth (during landing) with an acceleration equals to 'A' (positive acceleration) then its weight would become, W = (g + A) X m,  and hence, the weight would increase.

2.  If the helicopter is accelerated away from the earth (during take-off) with an acceleration equals to '- A' (negative acceleration) then its weight would become, W = (g - A) X m,  and hence, the weight would decrease.


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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
mechanical,kinetic (c)

Ans 2:

Class : Class 5
Hey, anyone wants to explain to me why it is option C?

Ans 3:

Class : Class 5
actually it is written wrong

Ans 4:

Class : Class 5
Its option (c), mechanical into kinetic

Ans 5:

Class : Class 5
mechanical into kinectic

Ans 6:

Class : Class 5
c

Ans 7:

Class : Class 1
Wanna explain why?

Ans 8:

Class : Class 7
Mechanical into kinetic energy.

Ans 9:

Class : Class 6
C.Mechanical, Kinetic

Ans 10:

Class : Class 5
c

Ans 11:

Class : Class 5

Ans 12:

Class : Class 5
c

Ans 13:

Class : Class 9
Mechanical,kinetic

Ans 14:

Class : Class 6
In the options, it is written wrong because it is mechanical , kinetic energy. Instead of that it should be muscular, kinetic energy

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Subject :NSO    Class : Class 2

Ans 1:

Class : Class 6

Ans 2:

Class : Class 4
D;none of these

Ans 3:

Class : Class 1
The correct answer is d.

Ans 4:

Class : Class 3
Mahi from Icon School Of Excellence, BengaluruClass:2D;none of these

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

The correct answer is A.


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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
Do lizards really have scales? I don't think so.

Ans 2:

Class : Class 5
I ticked the answer as D because fish have gills but the others dont

Ans 3:

Class : Class 8
The correct answer is CRhinoceros does not have scales on body

Ans 4:

Class : Class 1
Only this question I got wrong

Ans 5:

Class : Class 5
The correct answer is CRhinoceros doesn't have scales on their body while snake, lizard and fish have scales as body coveing

Ans 6: (Master Answer)

Class : Class 1

The correct answer is C.

Rhinoceros does not have scales on body while snake, lizard and fish have scales as body covering.


Ans 7:

Class : Class 1
Honestly, if you ask me,I chose snake as the answer because they can peel of their skin while the others can’t. So,Arumolzhi Ramesh I was thinking the same thing. But SOF and most of you guys say that the correct answer is C Rhinoceros as they do not have scales while the other three do. So it must be correct although I did not know lizards had scales on their bodies but as a matter of fact, they do so C must be the correct answer.

Ans 8:

Class : Class 1
Google says lizards have scales.

Ans 9:

Class : Class 5
I chose snake too, so Biju Pappachan and Arumolzhi Ramesh, I have the same thought process- it sheds its skin.

Ans 10:

Class : Class 9

Ans 11:

Class : Class 7
Snake, lizard and fish have scales as body covering while rhinoceros doesn't. Hence the correct answer is C

Ans 12:

Class : Class 8
The correct answer is CRhinoceros does not have scales on body while snake, lizard and fish have scales as body covering

Ans 13:

Class : Class 9
Snakes can peel their skin of while the others can’t

Ans 14:

Class : Class 7
Correct is c because rhino does not have scales while others do

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