National Science Olympiad Forum By SOF Olympiad Trainer - Page 507
  1. Home
  2. /  Forum

User Forum

Ask Your Question
DIKSHIT SUNDAR from vidhysaram, chennai
Subject :NSO    Class : Class 5

Ans 1:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
It is a very serious thing for us that we are getting wrong answers from SOF . It should be D only !

Ans 2:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 3:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 4:

Rishit Garg from Bhavan s B P Vidya Mandir , Nagpur
Class : Class 9

Ans 5:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10

Ans 6:

Ujjwal Upadhyay from Navy Children school, Vasco
Class : Class 6
The answer is d

Ans 7:

Suhani from DPSG, Modinagar
Class : Class 9
The answer is c

Ans 8:

Sumit Biswal from Dps gandhinagar, Gandhinagar
Class : Class 7
I was a bit confused between C and D

Ans 9:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7

Ans 10:

shivan iyer from dr pillai global academy, MUMBAI
Class : Class 4
d

Ans 11:

Hitanshi Behera from Loyola School , Bhubaneswar
Class : Class 4
ans is D so easy

Ans 12:

FAIZAN HUSSAIN from SYED ABID HUSSAIN SR. SEC. CHOOL (MIDDLE SECTION), DELHI
Class : Class 4
Low High Many Many

Ans 13:

ishaan from lvis, noida
Class : Class 5
c

Ans 14:

Soumyaraj Roy from Kendriya Vidyalaya , Thiruvananthapuram
Class : Class 7
Sorry , my brother changed the C into D . It should be C only !

Ans 15:

Aaditya Malhotra from Isaac Newton Global School, Mumbai
Class : Class 3
D

Ans 16:

Anantjit Chander from Apeejay School, Sector 15, Faridabad
Class : Class 10
Sorry all, I had not read the question well.😞😞

Ans 17:

Hitarth Bhardwaj from Teoler High School, Jaipur
Class : Class 6
Veer Sehrawat, how c, the question says which town is located near an unpolluted river not a polluted river.

Ans 18:

Satvik Agrawal from Delhi Public School, bhopal
Class : Class 5
no chart no answer

Post Your Answer

Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
NA

Ans 2:

ishit from EUROSCHOOL THANE, THANE WEST
Class : Class 7

Ans 3:

AHANA BAG from DELHI PUBLIC SCHOOL JOKA SOUTH KOLKATA, KOLKATA
Class : Class 9

Post Your Answer

Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Post Your Answer

Debarpan Das from Delhi Public School , Durgapur
Subject :NSO    Class : Class 4

Ans 1:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
What is mimicry?

Ans 2:

Ibrahim Aslam from uttam, Ghaziabad
Class : Class 5
😓😓copying

Ans 3:

SIDDHARTH KUMAR CHATTERJEE from NAVY CHILDREN SCHOOL , CHICALIM
Class : Class 7
Mocking or copying.

Ans 4:

Tejesh VB from GEMS New Millennium School, Al Khail, Dubai
Class : Class 8

Post Your Answer

aadin josefina from sorsfort international school,
Subject :NSO    Class : Class 4

Post Your Answer

Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

SJ HARITHA from PSNLO, BENGALURU
Class : Class 10

Ans 2:

Stuti Chakroborty from Jain Heritage School, Bangalore
Class : Class 6

Ans 3:

Aryan Agarwal from Mayoor School, Noida
Class : Class 8

Ans 4:

Aarushi Upadhyayula from The Cambridge International School, Bengaluru
Class : Class 7
The answer D is correct. Magnetic field moves from North to South, and if you follow the direction of the compasses, you will see that this theory is true.

Ans 5:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Ans 6:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct and is D as the magnetic field moves from North to south

Ans 7:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Post Your Answer

MARIA K PAUL from DON BOSCO SCHOOL OF EXCELLENCE EGMORE, CHENNAI
Subject :NSO    Class : Class 6

Ans 1:

Mansi Sadavarti from Vibgyor High, Pune
Class : Class 7
I agree with Aritroray the answer should be C

Ans 2:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10

Ans 3:

chittaranjan kar from MLZS, Jaipur
Class : Class 3
No guys. Human eye can't focus simultaneously on two points. To avoid parallax error , eye should be on the point of measurement to be taken.Hence given answer is correct in my view. You may comment.

Ans 4:

PARNIKA SINGH from GYAN GANGA EDUCATION ACADEMY, RAIPUR
Class : Class 10
GIVEN ANSWER IS NOT CORRECT AS A IS THE CORRECT ANSWER

Ans 5:

sujata patel from Podar International, Pune
Class : Class 6
it is simple that while measuring, at first you eye must be vertically above 0

Ans 6:

Rithvik Chandra from Greenwood High School, Bangalore
Class : Class 6
this is basic 6th grade physics, you cannot always be measuring 0cm, so as to avoid parallax error your eye must be placed right above the scale, if you do not beleive me ask your science/physics teacher. Hence it is A.

Ans 7:

atharv nila from VIBGYOR, Bengaluru
Class : Class 6

Ans 8:

sujata patel from Podar International, Pune
Class : Class 6
cccccccccccc

Ans 9:

from , Jajpur
Class : Class 6
the answer will be both a and b

Ans 10:

AUSTIN from Viswajyothi CMI Public School, Chowara
Class : Class 7
i think its C

Ans 11:

aritroray from Chirec International School, Hyderabad
Class : Class 8
I think it should be C because otherwise the zero end can shift slightly (in our viewpoint) and measurement will be wrong. So both statements a and b are correct and the answer is C.

Ans 12:

Anushka Srivastava from Cjm, Dehradun
Class : Class 7
no because what will u do of zero u have to

Ans 13:

Subhang Deep Sahu from Narayana CO Kadugodi Bangalore, Bangalore
Class : Class 8

Ans 14:

Rahil from Delhi Public School Faridabad, Faridabad
Class : Class 7
No as it causes a parallax error. It should be option A. If you don't believe me then try it yourself with a scale and measuring a line segment from different eye positions. You will see that, the measurement varies slightly every time. That's why option A is correct.

Post Your Answer

Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8

Ans 2:

Admin fly from Ddssxxx, Ax
Class : Class 1
A

Ans 3:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 4:

Aarohi Srihari Torgal from V.V.S B.M Sri Educational Institutions , Mysure
Class : Class 6
A

Ans 5:

Nandan Makineni from VIBGYOR HIGH, Bangalore
Class : Class 6

Ans 6:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
A

Ans 7:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 7

Ans 8:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 9:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9

Ans 10:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
A

Ans 11:

Admin fly from Ddssxxx, Ax
Class : Class 1

Ans 12:

arnav from Dps noida, Delhi
Class : Class 8
a

Ans 13:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Ans 14:

Rahil from Delhi Public School Faridabad, Faridabad
Class : Class 7
A as image is as far behind the mirror as Object is in front of it. In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead. As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror. As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror. ( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror. Hope that answers your question !

Post Your Answer

Deeptajit Roy from Gems Modern Academy, Dubai
Subject :NSO    Class : Class 5

Ans 1:

Dhruv Osekar from Mitra Academy, Bangalore
Class : Class 5

Ans 2:

ARUNAV from DPS VINDHYANAGAR, VINDHYANAGAR
Class : Class 10

Ans 3:

Manasvi Nagpal from blooming dales international school, sri ganganagar
Class : Class 5
yes ,you are rightans is c

Ans 4:

Achyut Prasad from Prabhujee English Medium School, Bhubaneswar
Class : Class 5
Ans is C potato is stem and sugar cane also stem

Post Your Answer

Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Raghav Agarwal from Dinobli School, jharia
Class : Class 4
How is it C

Ans 2:

Kashika Goel from DPS Noida, Noida
Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Ans 3:

Kashika Goel from DPS Noida, Noida
Class : Class 7
frictional force is answer prevents from slipping

Ans 4:

Prayaan handel from Billabong high international school, Bhopal
Class : Class 4
how about B

Ans 5:

Ashwak from Cambridge, Jalandhar
Class : Class 9

Ans 6:

Ivan Tyagi from Chirec International School , Hyderabad
Class : Class 8

Ans 7:

Vineet Banode from New Horizon Scholars School, Pune
Class : Class 5
Yes how it can be C ?

Ans 8:

Kashika Goel from DPS Noida, Noida
Class : Class 7
B is not correct as it is gravity that causes objects to fall on the ground

Post Your Answer