National Science Olympiad Forum By SOF Olympiad Trainer - Page 583

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Ans is A because of this relationship: Sedimentary : Metamorphic : Igneous

Ans 2:

Class : Class 6
Ans is A because of this relationship: Sedimentary : Metamorphic : Igneous

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Solution States that "correct" answer is wrong!

Ans 2:

Class : Class 8
Option A

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
Explanation in the solution is not matching any options. According to explanation option one and three are correct.

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
It's chalk powder

Ans 2:

Class : Class 9
chalk powder is insoluble in water while others are soluble, chalk powder can be separated from water by sedimentation and decantation or filtration but others need evaporation...… Now I think Harsh you understood why the answer is D!!

Ans 3:

Class : Class 8
Coffee Coffee Coffee Coffee Calls out Calls out the answer is C in the answer it is me it is me it is me

Ans 4:

Class : Class 4
The answer is D because D cant desolve in water while others can.So the answer is D.

Ans 5:

Class : Class 5
coffee powder

Ans 6:

Class : Class 7
It's chalk powder

Ans 7:

Class : Class 8

Ans 8:

Class : Class 5

Ans 9:

Class : Class 8

Ans 10:

Class : Class 3
Ans-d

Ans 11:

Class : Class 9
The correct answer is C . It will be coffee power.

Ans 12:

Class : Class 6
The correct answer is d chalk powder because it is insoluble in water while the rest are not.

Ans 13:

Class : Class 5
my actual answer is salt

Ans 14:

Class : Class 5
salt

Ans 15:

Class : Class 8
salt for the way

Ans 16:

Class : Class 5
coffee powder

Ans 17:

Class : Class 6
It's C coffee powder.

Ans 18:

Class : Class 5
The correct answer is d

Ans 19:

Class : Class 7
Coffee powder

Ans 20:

Class : Class 5
why is chalk powder the correct answer?

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
the answer can even be 'B' as semi-circle is there ,made by square

Ans 2:

Class : Class 8
IT SHOULD BE 5 AS THERE IS SQUARE TRIANGLE SEMECIRCLE RECTANGLE AND DIAMOND

Ans 3:

Class : Class 5
its d

Ans 4:

Class : Class 5
why semicircle not be counted

Ans 5:

Class : Class 6
all listen it should be 5 as i think because the rectangle is dividing the circle into two halves which is forminig a semi circle and if sof has to 4 which means that it should be a whole shape like circle triangle etc.so if it is wholes shape SOF is right or elseNiteen Jit Sahu and all others who say semi circle are right

Ans 6:

Class : Class 8
b as there is a semi-circle

Ans 7:

Class : Class 4
5

Ans 8:

Class : Class 4
55555555555555555555555555555555555555555 is the ans

Ans 9:

Class : Class 3
ayurda 4 d 4

Ans 10:

Class : Class 4
4 IS THE CORRECT ANSWER

Ans 11:

Class : Class 9
The answer is D) 4

Ans 12:

Class : Class 7
Can you tell the answer of this question

Ans 13:

Class : Class 7
SEMICIRCLE5B

Ans 14:

Class : Class 7
5 is the answer because there is even semi circle there with rectangle,square and triangle.

Ans 15:

Class : Class 8
How are we supposed to know it’s a rectangle when hidden by the circle ,bonne nuit

Ans 16:

Class : Class 8
semicircle is there but made by square so the answer is 4

Ans 17:

Class : Class 7
There is no semicircle.Answer is 4.

Ans 18:

Class : Class 6

Ans 19:

Class : Class 5
5

Ans 20:

Class : Class 8
How 5? answer is 4The shapes are:circle,triangle,rectangle and square

Ans 21:

Class : Class 5

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9

Ans 2:

Class : Class 9
The correct answer is d as friction acts opposite to the direction of the applied force

Ans 3:

Class : Class 8
How can the direction of friction be towards east? It should always act in the direction opposite to that of the direction of the moving body, i.e., friction should act towards the west irrespective of whether the vehicle is accelerating or retarding. So the correct answer should be D!

Ans 4:

Class : Class 9
I ALSO THINK THE ANSWER IS D

Ans 5:

Class : Class 9
I'm confused about the same thing...friction opposes relative motion, so it will obviously be towards west??

Ans 6:

Class : Class 8
The answer should be D

Ans 7:

Class : Class 8
the answer is D but is given wrong in this question .

Ans 8:

Class : Class 8
the answer has to be d because friction always oppose the relative motion of an object no matter if it accelerates or not.

Ans 9:

Class : Class 8
Answer is D

Ans 10:

Class : Class 9
The answer is A.

Ans 11:

Class : Class 10

Ans 12:

Class : Class 8

Ans 13:

Class : Class 10
see guys, i think u all are mistaken. We dont consider in what direction the car is going, but in which direction the wheel is turning. for the car to go forwards, the wheel must roll clockwise. so for the car to go east, wheel must roll in the clockwise direction. Now consider a very small part of the wheel which is touching the ground. to wheel to roll in clockwise direction , that small part must slide backward, and that must continously happen in order for wheel to turn clockwise and car to go in east direction. And u know, friction is b/w the surface in contact, i.e the rolling part of the wheel, not with the car. so friction should oppose the backward-going part of the wheel, and thus in the ame direction with the motion of the car. if friction were to be in west, the car would never go in east direction, because the wheel would'nt have any force to oppose, to make it go in that direction, and thus the car would never be able to go towards the east direction!

Ans 14:

Class : Class 7
Answer is d

Ans 15:

Class : Class 8

Ans 16:

Class : Class 8
D

Ans 17:

Class : Class 8
Yes answer is D

Ans 18:

Class : Class 8
I think that option "D" is the correct answer as friction is always opposite to direction of motion of the object

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
C because 25341 spells stick

Ans 2:

Class : Class 5
25341

Ans 3:

Class : Class 5
25341

Ans 4:

Class : Class 7
C

Ans 5:

Class : Class 4
it is wrong

Ans 6:

Class : Class 4
c

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 4
Explain PleaseI need the explaination

Ans 3:

Class : Class 4

Ans 4:

Class : Class 6
YOU! An admin from Revisewise, you don't even own up to SOF's mistake.Da questions do not show properly and you think I'm responsible!

Ans 5: (Master Answer)

Class : Class 1

Ans 6:

Class : Class 8

Ans 7:

Class : Class 5
d

Ans 8:

Class : Class 4

Ans 9:

Class : Class 5
DDD

Ans 10:

Class : Class 5
D is the right ansExplanation- LOW VITAMIN A - NIGHT BLINDNESSLOW V. B - BERI BERI

Ans 11:

Class : Class 4
B is the answer

Ans 12:

Class : Class 9
D

Ans 13:

Class : Class 5

Ans 14:

Class : Class 5
what they've went and done is put exxxtra optionsss! Real irratating

Ans 15:

Class : Class 8
d is the right answer

Ans 16:

Class : Class 5

Ans 17:

Class : Class 4
ans was b and i wrote b

Ans 18:

Class : Class 4
CAN SOMEONE EXPAIN?

Ans 19:

Class : Class 5
d

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
option b

Ans 2:

Class : Class 4
Olympiad trainer is saying wrong it would be B bcoz it is 18....

Ans 3:

Class : Class 3

Ans 4:

Class : Class 6
SOF Trainer Is Saying Option D But I Think It Is Option C

Ans 5:

Class : Class 5
My head is not working and you all are crowding at a simple question! The answer of this question is always bbbbbbbbbbbbbbbbbbbbbb. Are you all are a small kindergarten kids? I think yes. You all are a kids . I think you all will in class 9 or 10. I am sure.

Ans 6:

Class : Class 8

Ans 7:

Class : Class 4
ans b is the answer......

Ans 8:

Class : Class 4

Ans 9:

Class : Class 7
B

Ans 10:

Class : Class 4
Answer has to be option B

Ans 11:

Class : Class 4
I think it is c.

Ans 12:

Class : Class 5
It's answer should be B option

Ans 13:

Class : Class 7
d

Ans 14:

Class : Class 1
A

Ans 15:

Class : Class 4

Ans 16:

Class : Class 8
How a Vineet?

Ans 17:

Class : Class 8
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Ans 18:

Class : Class 4
The answer should be option C

Ans 19:

Class : Class 6

Ans 20:

Class : Class 5
Seen you all later.

Ans 21:

Class : Class 7

Ans 22:

Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
a is answer

Ans 2:

Class : Class 8

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