National Science Olympiad Forum By SOF Olympiad Trainer - Page 768
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Pragya Mahajan from BCM Arya Model Sr Sec School, Ludhiana
Subject :NSO    Class : Class 6

Ans 1:

Ansh agarwal from D.P.S, Greater Noida
Class : Class 9
Actually the answer is metal ring . if we will put light on it a hollow circular shadow will be formed while we can make a circular shadow by other 3 objects by arranging them in different angles

Ans 2:

jyoti from kps, Noida
Class : Class 4
I think it should be a cone because the bottom surface of a cone is round

Ans 3:

aditi patel from st.kabir school, Ahmedabad
Class : Class 6
b

Ans 4:

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

Ans 5:

Nishanth Tripathy from Presidency South, Bengaluru
Class : Class 6
I faced the same problem. I do think that egg is the appropriate answer.

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Dhruvi from Delhi Public School, Navi Mumbai
Subject :NSO    Class : Class 5

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Dhruv from Springdales, Dubai
Subject :NSO    Class : Class 3

Ans 1:

Kaustubh rao from Alpha wisdom vidyashram, Trichy
Class : Class 5
The answer is D

Ans 2:

from ,
Class :
To allow better ventilation.

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Prajjit Gon from Basava International School, New Delhi
Subject :NSO    Class : Class 7

Ans 1:

Senthil Kumar from ARB INTERNATIONAL SCHOOL, Coimbatore
Class : Class 7
ANSWER IS C

Ans 2:

Vedant Pungliya from ,
Class : Class 7
c

Ans 3:

amit kumar basistha from anundoram borooah academy, pathsala
Class : Class 7
D

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Amanjeet Singh from ,
Subject :NSO    Class : Class 5

Ans 1:

Gauri Chaturvedi from St. Joseph Convent, Jabalpur
Class : Class 6
Answer is B

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ASHNA JAIN from inventure ACADEMY, Bengaluru
Subject :NSO    Class : Class 6

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Prajjit Gon from Basava International School, New Delhi
Subject :NSO    Class : Class 7

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ASHNA JAIN from inventure ACADEMY, Bengaluru
Subject :NSO    Class : Class 6

Ans 1:

Anmol kathar from deogiri global academy, aurangabad
Class : Class 10
the correct option is D and i have written D then also they had given me wrong and they had telling the answer B.

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kaithabjeetsingh@gmail.com from the shri ram school aravali, Gurgaon
Subject :NSO    Class : Class 7

Ans 1:

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

Ans 2:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10
How

Ans 3:

Ishaan Roy from Sri Chaitanya Techno School, Bengaluru
Class : Class 10

Ans 4:

tashu gupta from Shanti Asiatic , jaipur
Class : Class 7
WHY NOT A

Ans 5:

Supratim Biswas from DPS RUBY PARK KOLKATA, kolkata
Class : Class 5

Ans 6:

Rayhan Khan from Sister Nivedita School, Hyderabad
Class : Class 7
Why is it A?

Ans 7:

aritroray from Chirec International School, Hyderabad
Class : Class 8
It should be A

Ans 8:

Arnav Raj Sharma from GEMS International School the ultra master mega, Gurgaon
Class : Class 7
why not A

Ans 9:

Ishaan Roy from Sri Chaitanya Techno School, Bengaluru
Class : Class 10

Ans 10:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4
how is the answerB. according to my science text book ( New science ahead class 7, pg.47), Black not only absorbs heat fast,but also radiates heat fast and cools down faster, accordingto that,answermust be A.

Ans 11:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM
Class : Class 10
B IS GIVEN HERE IN NSO TEST.

Ans 12:

Sargah Surya from bgsnps, Bengaluru
Class : Class 4
Black radiates and absorbs heat faster. Confirmation is their in almost all science tb and google too. So answer must be A. WHY NOT A

Ans 13:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9
I agree with you Anushree because the same thing is given in our science textbook also

Ans 14:

Rudra Patil from Podar International School, Aurangabad C.B.S.E, Aurangabad
Class : Class 4
Please Explain why is the answer (B)

Ans 15:

Sradha Ratheesh from MGM central Public School, Trivandrum
Class : Class 8
It's A right?

Ans 16:

Archit Santosh Darakh from Podar International School , Aurangabad
Class : Class 9

Ans 17:

Aditya Sai Vemparala from Amanora school, Pune
Class : Class 10

Ans 18: (Master Answer)

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

Ans 19:

Anubhab Maity from Dps ruby park, Kolkata
Class : Class 7

Ans 20:

GAUTHAM GOPINATH from BPDAV School, HYDERABAD
Class : Class 10
I think that the answer is A.Could someone explain why it is B?

Ans 21:

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

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SAUGATA SAHA from ,
Subject :NSO    Class : Class 3

Ans 1:

from ,
Class :
The pencil looks bent because of the phenomenon called Refraction. When light enters water it cannot move as fast as it does in the air. As the light enters the water on an angle it does not follow its original path, and this makes the image look bend.

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