National Science Olympiad Forum By SOF Olympiad Trainer - Page 808
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Sita Vishnuvajjala from national public school yelahanka, Bengaluru
Subject :NSO    Class : Class 7

Ans 1:

Saniya Wasnik from Chanda Public School, Chandrapur
Class : Class 8
The fine soft underhair close to skin are used to make wool :)

Ans 2:

Aditya kumar from Sapphire International School, Noida
Class : Class 8
wool is only sheared from body so answer is B

Ans 3:

ISHANI M KUMAR from BETHANY CONVENT, PARADEEP
Class : Class 9
The answer will be C. As coarse hair (burrs) are used to make low grade materials like rugs, good hair is used to make sweaters and shawls.

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kenisha from Venkat international public school, Bengaluru
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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abhinav from fitjee world school, Hyderabad
Subject :NSO    Class : Class 6

Ans 1:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6
the answer will be B because the motion of the bar magnet should be RIGHT TO LEFT whereas in Fig. 3 the direction of stroking is LEFT TO RIGHT

Ans 2:

khushi Joshi from Svkm , Mumbai
Class : Class 10
The answer is D

Ans 3:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 4:

Tushar from DPS, Bengaluru
Class : Class 9
The correct answer is D as in the first and second cases the direction of the strokes are as per the poles and in the third case the picture shows the opposite direction of the stroke but in the correct pattern.

Ans 5:

ramesh datta from DPS dwarka , New Delhi
Class : Class 7
answer should be d because in 1 and 2, direction of stroking is from right to left and thus, where the pole of the magnet is north and south, they will at the same place on the steel bar. in option 3, where the pole of the magnet is north/south, but on the steel bar it is the opposite(south/north). but because the direction is not left to right, but right to left, thus, all the options are correct.

Ans 6:

JUGAAJYOTI DASH from Doon International School, Bhubaneswar
Class : Class 9
all the figures are correct. Please mark the movement. In figure 3, the striking magnet will first touch at other end resulting it as a South pole.

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Ashutosh Agnihotri from cms lucknow, Lucknow
Subject :NSO    Class : Class 5

Ans 1:

Arjun Sankar from PSBB SS School, Chennai
Class : Class 3
option c was not clear...it was confusing...

Ans 2:

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Class : Class 7
option"C" isn't clear enough to identify it

Ans 3:

Rabi rajak from SHREE JAIN VIDYALAYA, Kolkata
Class : Class 5
And:c

Ans 4:

Indranuj from Ryan International, Mumbai
Class : Class 9
C is stethoscope

Ans 5:

atharv vedant from Swami Vivekanand International School, Mumbai
Class : Class 6
D

Ans 6:

ratankrmandal@yahoo.com from Vivekananda Mission School, Haldia
Class : Class 7
c is walkman

Ans 7:

Sumit G from Greenwood High International, Bengaluru
Class : Class 8
A is not correct as it converts wind energy into electrical energy B is not correct as it converts electrical energy int heat energy. and I am not sure what is the c one

Ans 8:

Gauri Singh from St Johns School Marhauli, Varanasi
Class : Class 8

Ans 9:

Sumant Angadi from Jain Heritage School, Belgavi
Class : Class 5
option c is confusing. which appliance it is?

Ans 10:

Varsha.K from DAV Public School - Velachery, Chennai
Class : Class 5
C IS NOT STETHOSCOPE IT IS A CD WITH A CABLE . A CD HAS CHEMICAL ENERGY [BATTERY] AND IT DOESN'T CONVERT IT INTO ANY OTHER FORM HENCE C IS ALSO CORRECT

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kenisha from Venkat international public school, Bengaluru
Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Aritra Porey from DPS Bangalore North, Bengaluru
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1
The correct answer is C.

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Rajas Jethi from Delhi Public School, Chandigarh
Subject :NSO    Class : Class 6

Ans 1:

kabir kaul from jain heritage, belgaum
Class : Class 6
hello

Ans 2:

nitin bhutada from bhavans b p vidya mandir trimurti nagar nagpur, Nagpur
Class : Class 7

Ans 3:

SANAJY GOPAL BHARTARIYA from ST. FIDELIS COLLEGE, LUCKNOW
Class : Class 6
The correct answer should be B because bulb B and C are in parallel connection,and current flows equally in parallel connection.So the brightness of bulb A will remain same but the brightness of bulb B will decrease,as the current which was flowing only to bulb B will now flow to both bulb B and bulb C.i have reported error for this question

Ans 4:

HARSHAL KUTE from cambridge school buldhana, Buldhana
Class : Class 6
I CAN'T SEE THE PICTURE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Ans 5:

SAHANA RAY from D.A.V. PUBLIC SCHOOL,MIDNAPUR, MIDNAPUR
Class : Class 6

Ans 6:

Abhaid Goel from Indian School , Muladha
Class : Class 10
the corect answer should be b

Ans 7:

sachinthite@rocketmail.com from Sinhghad Public School Korti, Pandharpur
Class : Class 4
hihbhbbubb

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Rudrashish Chakraborty from Sudarshan Vidyamandir ICSE Academy, Bangalore
Subject :NSO    Class : Class 4

Ans 1:

Vimala from Narayana, Bangalore
Class : Class 4

Ans 2:

Vimala from Narayana, Bangalore
Class : Class 4

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Kalpana Dubey from R K SARDA VIDYA MANDIR, Raipur
Subject :NSO    Class : Class 5

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Kalpana Dubey from R K SARDA VIDYA MANDIR, Raipur
Subject :NSO    Class : Class 5

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