National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 4

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Class : Class 4

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
Answer is c

Ans 2:

Class : Class 7
No.it has muscle like organs which produces a slimy substance on which the snail moves on using bristles situated under its body

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Subject :NSO    Class : Class 8

Refer to the given terms.

(i) RBC (ii) WBC
(iii) Blood (iv) Muscle
(v) Blood vessels (vi) Brain
(vii) Heart (viii) Lung
(ix) Sperm (x) Kidney

Select the option which correctly classifies the given terms into cell, tissue and organ.

  Cell Tissue Organ
A (i), (ii), (ix) (iii), (iv) (v), (vi), (vii), (viii), (x)
B (i), (ii), (iii), (x) (iv), (v) (vi), (vii), (viii), (ix)
C (i), (ii), (iv), (ix) (iii), (v), (vi) (vii), (viii), (x)
D (i), (ii), (ix) (iii), (iv), (v) (vi), (vii), (viii), (x)


HOW A IS CORRECT???

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
B

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Subject :NSO    Class : Class 8

Read the given statements and select the correct option.
Statement 1 : While drawing a line on a paper, friction force acts on paper in the same direction along which line is drawn on the paper.
Statement 2 : Friction always opposes motion.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.


I don't understand how statement 1 is true

Ans 1:

Class : Class 9
In my opinion statement 2 is true and statement 1 is false as friction always opposes the motion of an object. Also the friction between the pencil and paper should be exerted in the opposite direction.

Ans 2:

Class : Class 8
IT 'S ANSWER SHOULD BE D?

Ans 3:

Class : Class 8
All the options must be incorrect as friction always opposes motion and friction acts in direction opposite of force applied but there is no option saying this

Ans 4:

Class : Class 9

Ans 5:

Class : Class 10
not in all cases friction opposes, this is proved from statement 1 as friction acts backward on the paper and it will act forward on the direction where the pencil is moved

Ans 6:

Class : Class 9
No statement 1 is correct where as statement 2 is also correct

Ans 7:

Class : Class 9

Ans 8:

Class : Class 5
statement 1 is falsewhereas statement 2 should be true

Ans 9:

Class : Class 8
Yes , I also agree that friction always opposes motion and the following options are incorrect as *Statement 1* is incorrect and *Statement 2* is correct. There is surely some error.

Ans 10:

Class : Class 9
But friction always opposes motion...then how are they saying that option c is true?

Ans 11:

Class : Class 9
Friction always opposes motion but while drawing a line on a paper, the frictional force acts in the opposite direction in which the tip of the pen acts / the line is drawn. I think all options are incorrect as 'statement 1' is wrong but 'statement 2' is right

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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Subject :NSO    Class : Class 4

Mr Wadhera thought that his garden dried out most quickly when it was hot and windy. He decided to investigate. He watered his dry garden on four different mornings for 10 min at 8 am using the same amount of water.
What should be the weather conditions for four subsequent days to get a fair test?


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


explain

Ans 1:

Class : Class 8

Ans 2:

Class : Class 5
Please somebody explain.

Ans 3:

Class : Class 5
dude i asked you to explain .Not give the answers because you have done it before.[i am talking to you only, Shaurya uniyal]

Ans 4:

Class : Class 4
The meaning of the symbols is not clear.

Ans 5:

Class : Class 5

Ans 6:

Class : Class 4
So, for an experiment you need multiple values for comparison. This question states that the experiment is to be carried out for four days, meaning that you need to compare four different scenarios. The first one is obviously hot and windy. The four scenarios- hot, windy, calm and cloudy must be paired with each other forming these- hot and windy, hot and calm, windy and cloudy, cloudy and calm- option B

Ans 7:

Class : Class 5

Ans 8:

Class : Class 4
I don't understand the guestion. Can somebody explain.

Ans 9:

Class : Class 4
C

Ans 10:

Class : Class 4

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