National Science Olympiad Forum By SOF Olympiad Trainer - Page 522

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
both b and d are correct.

Ans 2:

Class : Class 7
The answer could be B and D as both are correct

Ans 3:

Class : Class 6
Also, d is right. Attraction is a sure test for magnetism. both b and d are right. Compromised?

Ans 4:

Class : Class 10
The correct answer is option B . A compass may be used to find East and west direction . Once you find North and South , by facing north , the right side will be East and left one will be West

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
as per Wikipedia no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
2 and 4 is the answer to this question

Ans 4:

Class : Class 5
How is 1 correct? Please reply

Ans 5:

Class : Class 5

Ans 6:

Class : Class 9
no volcano had erupted on Venus in the past 2.5 million years so 2 is the only correct option

Ans 7:

Class : Class 5
Please correct it

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
B is the answer to this question but it is showing A as correct option and it is showing B as correct option in the solutions.

Ans 2:

Class : Class 8
This question is correct

Ans 3:

Class : Class 6

Ans 4:

Class : Class 7
THERE CHECKING IS WRONG AS ANSWER IS C

Ans 5:

Class : Class 5
Both A and C are correct

Ans 6:

Class : Class 5

Ans 7:

Class : Class 5
It says which option is incorrect not which one is correct

Ans 8:

Class : Class 6
cerebrum is the largest part of the brain. cerebellum is the second largest part and it controls musculo-skeleton movement

Ans 9:

Class : Class 6
this question is wrong

Ans 10:

Class : Class 4

Ans 11:

Class : Class 6
Correct answer should be d because cerebellum is below cerebrum, located towards the back of the brain.

Ans 12:

Class : Class 3
This is absolutely correct as y is cerebrum and x is. EllThis Is absolutely correct as y is cerebrum X is cellebellum and Z is the Medulla ✅✅✅✅

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 6
A

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 4

Ans 2:

Class : Class 6
The answer does not match with the solution. There should be a change in the answer.

Ans 3:

Class : Class 9
YES , their answer is not matching with their solution !!

Ans 4:

Class : Class 6
The option selected here is wrong.

Ans 5:

Class : Class 3
ayush u are right!!!!!!!!!!!!!!!

Ans 6:

Class : Class 6
Although the explanation is correct, it does not match the answer

Ans 7:

Class : Class 8
Pls rectify.

Ans 8:

Class : Class 9

Ans 9:

Class : Class 9
yes !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 10:

Class : Class 7
why arent they changing the answer

Ans 11:

Class : Class 6

Ans 12:

Class : Class 7
Given correct answer and explanation do not match...please rectify...

Ans 13:

Class : Class 5

Ans 14:

Class : Class 6
NA

Ans 15:

Class : Class 3

Ans 16:

Class : Class 10
clear objection

Ans 17:

Class : Class 7
There is no option only for the answer they had provided us with, gave the correct explanation but the need to correct the answer as well.

Ans 18:

Class : Class 7
they aren't giving the answer and the solution same in some papers

Ans 19:

Class : Class 10

Ans 20:

Class : Class 4
What is this? Answer and solution are completely different, they are not matching!

Ans 21:

Class : Class 7

Ans 22:

Class : Class 9
The correct is NSN

Ans 23:

Class : Class 7
Answer and solution are completely different, they are not matching!The solution is correct, but their ans is wrong

Ans 24:

Class : Class 8
The ans is not matching!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 25:

Class : Class 6
correct option is C, not B. Please make correction.

Ans 26:

Class : Class 9
please explain. your solution doesn't match the correct answer provided by you.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
I think this answer is wrong. It should be 0.2 seconds, according to the definition of a Time Period in oscillatory motion.

Ans 2:

Class : Class 7
The answer seems to be wrong. 5 seconds to complete 25 oscillations. That means for one oscillation it is 5/25 = 0.2 seconds. 'Period' usually means one complete oscillation that is 0.2 seconds and that is not given.

Ans 3:

Class : Class 7
wrong answer. should be 0.2s

Ans 4:

Class : Class 6
The answer should be 0.2 s

Ans 5:

Class : Class 8

Ans 6:

Class : Class 7

Ans 7:

Class : Class 8
According to definition - answer would be 0.2 s

Ans 8:

Class : Class 10
the answer is wrong , it should be 0.2s. please kindly provide the solution to this question.

Ans 9:

Class : Class 10
According to definition - answer would be 0.2 s

Ans 10:

Class : Class 4
Answer is wrong

Ans 11:

Class : Class 7
The time taken to complete one oscillation - a left swing and a right swing - is called the time period (T); it is measured in seconds.A swing takes 5 seconds to complete 25 oscillations. That means it would take 1 second to complete 25 ÷ 5 = 5 oscillations. That also means it would take 1 ÷ 5 = 0.2 seconds to complete 1 oscillation.So, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 12:

Class : Class 7
The swing completes 25 oscillations in 5 seconds So, It will complete 1 oscillation in 5/25 seconds = 0.2 secondsSo, the time period of the swing is 0.2 seconds. Hence, the right answer is Option C.

Ans 13:

Class : Class 7
I THINK IT COMPLETES 25 OSCILLATIONS IN 5s

Ans 14:

Class : Class 7
The answer is wrong. It is 0.2

Ans 15:

Class : Class 6
The answer has to be 0.2 seconds(5/25). Pls correct

Ans 16:

Class : Class 10
answer is wrong it should be 0.2 s

Ans 17:

Class : Class 9
the answer is wrong

Ans 18:

Class : Class 8
please explain the answer

Ans 19:

Class : Class 6

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
option a

Ans 2:

Class : Class 9
i checked in google. ans is a

Ans 3:

Class : Class 7
Option B

Ans 4:

Class : Class 7

Ans 5:

Class : Class 8
option b is the correct answer

Ans 6:

Class : Class 9

Ans 7:

Class : Class 7

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 1
I think that c is correct as the moon is behind the earth , so there will be no light reaching the moon . Thus, it will be new moon .

Ans 2:

Class : Class 6
b) IT SHD BE FULLLLLLLLLLLLLL MOOOOOOOOOOOOOON!?!??!

Ans 3:

Class : Class 6
Moon will get no sunlight.THIS ISN’T POSSIBLE!!!!!

Ans 4:

Class : Class 9
c

Ans 5:

Class : Class 6
moon does not have its own light it reflects of sun and as it is completely blocked by earth the suns light does not reflect and we do not see any phase of the moon .hence ans is c

Ans 6:

Class : Class 5
This is wrong i thinkThe answer should be C

Ans 7:

Class : Class 7
It is showing C as the answer to this question

Ans 8:

Class : Class 5
THE MOON IS NOT STRAIGHT TO THE EARTH. MOON HAS SLIGHT SLANTING REVOLUTION. THAT IS WHY WE HAVE DIFFERENT PHASES OF THE MOON. IF THE MOON IS AT THE POSITION OF..... SUN---EARTH---MOON.......SO THAT WILL BE FULL MOON. FULL MOON IS GIVENN AT OPTION B. SO MOST OF US LIKE ME DID B BUT IT IS SHOWING C AS THE CORRECT ANSWER. BUT AS I THINK THAT EVERYTHING HAS A REASON.1. THE SOLUTION IS THE MEANINGFUL WAY IT IS GOOD. BUT IF YOU OPPOSE THIS, SO 2. THAT THE CHART IS SHOWING THAT....... SUN-----EARTH-----MOON. SO ACCORDING TO THE CHART, IT IS A LUNAR ECLIPSE IN WHICH THE MOON IS COMPLETLY BLACK. SO OPTION C HAS A REASON. SHARE YOUR IDEAS ALSO.

Ans 9:

Class : Class 4

Ans 10:

Class : Class 6
Yes!I checked it on Google!IT IS FULL MOON!!!!!!????

Ans 11:

Class : Class 3
C

Ans 12:

Class : Class 8
It will cause full moon ???

Ans 13:

Class : Class 9
How come it is C ? This is insane!!!

Ans 14:

Class : Class 6
but how?

Ans 15:

Class : Class 5
it is b

Ans 16:

Class : Class 5
IT SHOULD NOT BE C! B IS THE RIGHT ANSWER. IF SUN EARTH MOON= FULL MOON. IF SUN MOON EARTH = NEW MOON. .

Ans 17:

Class : Class 5
It is a full moon and I had enough of your mistakes SOF now, I am going to beat you people.

Ans 18:

Class : Class 8

Ans 19:

Class : Class 5

Ans 20:

Class : Class 5
This is absolutely incorrect. SOF should verify such answers. The question is about the phase of the moon. Even if it is a lunar eclipse it falls on a full moon day. The answer is B

Ans 21:

Class : Class 6
if the answer is c, then they would have mentioned that it is a lunar eclipse. so it should be b

Ans 22:

Class : Class 6
how is this possible

Ans 23:

Class : Class 4
b is answer

Ans 24:

Class : Class 5
According to any phases of the moon diagram, a full moon will be behind the Earth. Even lunar eclipse will be on a full moon day . New moons position will be the opposite of a full moon,i.e. between the earth and sun

Ans 25:

Class : Class 5
Full moon occurs when light is spread all over the surface of the moon...but in the picture the moon is blocked by earth and the moon will remain dark.Hence,the answer is (c) new moon

Ans 26:

Class : Class 8

Ans 27:

Class : Class 5

Ans 28:

Class : Class 4
only c

Ans 29:

Class : Class 7

Ans 30:

Class : Class 5
The answer is b not c

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