National Science Olympiad Forum By SOF Olympiad Trainer - Page 621

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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
kya bhai

Ans 3:

Class : Class 5

Ans 4:

Class : Class 9
Skin is an OrganSkin is an Organ Skin is an OrganSkin is an organSkin is an organ

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
The answer should be a

Ans 2:

Class : Class 9
answer is a

Ans 3:

Class : Class 10
Is this answer right?I mean, egg cells have more genetic material than skin cell, right?

Ans 4:

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

Ans 2:

Class : Class 8
Statement 2 is correct while Statement 1 incorrect as frictions is defined as a force which opposes motion and it would not be frictional force if it is not opposing motion that why there has to be a option E.

Ans 3:

Class : Class 9
I agree with ANUBHA MAHAJAN as friction does not always oppose the motion.

Ans 4:

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

Ans 5:

Class : Class 9

Ans 6:

Class : Class 5
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 7:

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 8:

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

Ans 9:

Class : Class 8
You

Ans 10:

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

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

Ans 12:

Class : Class 9
It should be E first statement is incorrect while second statement is correct.

Ans 13:

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 14:

Class : Class 5
all the options are incorrect as statement 1 is false and statement 2 is true.so the answer should look like:(iv)none of these

Ans 15:

Class : Class 9
Statement 1 is false while Statement 2 is true

Ans 16:

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 17:

Class : Class 8
Friction not always opposes motion, it opposes the relative motion but they should've given examples of it. I have read it in a book but there is no examples there, too. :-?

Ans 18:

Class : Class 8
Why dont they update the answers and options?? THERE SHOULD BE A NEW OPTION HERE

Ans 19:

Class : Class 8
statement 1 is falsewhereas statement 2 should be true

Ans 20:

Class : Class 5

Ans 21:

Class : Class 9
YES THERE IS A LOT OF ERROR IN THE OPTIONS

Ans 22:

Class : Class 7
Technically, all of the options are incorrect, as Statement 1 is false and Statement 2 is true.

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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 4
Can somebody explain the answer to the question?

Ans 3:

Class : Class 7
What on earth does guestion mean you idiot and infant

Ans 4:

Class : Class 6
I don't understand the guestion. Can somebody explain.

Ans 5:

Class : Class 3
I think it is B?.?.

Ans 6:

Class : Class 9
please somebody explain......They have not given the solution.............

Ans 7:

Class : Class 4

Ans 8:

Class : Class 7

Ans 9:

Class : Class 4

Ans 10:

Class : Class 6
C

Ans 11:

Class : Class 5
Thank you, Shailaja Divakar

Ans 12:

Class : Class 6
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 13:

Class : Class 8

Ans 14:

Class : Class 1
Please explain. .....

Ans 15:

Class : Class 3
I agree with Harish Divakar and Ridhima . The ans is b

Ans 16:

Class : Class 4

Ans 17:

Class : Class 6
The meaning of the symbols is not clear.

Ans 18:

Class : Class 4
they have not given the solution........ please explain

Ans 19:

Class : Class 5
Please somebody explain.

Ans 20:

Class : Class 2
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 21:

Class : Class 4

Ans 22:

Class : Class 4

Ans 23:

Class : Class 9

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
Hey ! I wrote B only ! They changed my answer !

Ans 2: (Master Answer)

Class : Class 1

The correct answer is B.


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Subject :NSO    Class : Class 5

A ship is made of iron but still it floats in water. This is because of its shape. A ship is hollow in the middle. When it is in water, the entire volume of the ship, including the hollow portion displaces water to make space for itself. The volume of water displaced is much more than the volume of iron in the ship. Therefore, the ship floats in water.
In the above passage, the floatation of ship is being described with ______ principle.

A Newton's
B Archimedes'
C G auss'
D Both A and B


Ans 1:

Class : Class 8
B is the answer

Ans 2:

Class : Class 8
B is the answer

Ans 3:

Class : Class 5
What is the meaning of archimedes[']

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Subject :NSO    Class : Class 7

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