National Science Olympiad Forum By SOF Olympiad Trainer - Page 547
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santosh katiyar from narayana vidhyalayam, Nagpur
Subject :NSO    Class : Class 7

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JANYA CHANGELA from UDGAM SCHOOL FOR CHILDREN , Ahmedabad
Subject :NSO    Class : Class 5

Ans 1:

Samanyu from NPSI, Singapore
Class : Class 5
The straw is not empty; there is air inside the straw.When we dip the straw in any liquid and suck on one end of the straw, we are sucking the air out of the straw (it goes into our mouth). Now the atmosphere is pushing down on the liquid in the glass, so the liquid rises into the straw from the other end, and goes into our mouth.If we do not suck on the straw, the liquid will not rise in the straw. That means the air inside the straw is applying pressure on the liquid and not letting it rise.That means Option C is the right answer – Air exerts pressure.

Ans 2:

Suvan S from Edify School Chikkabanavara, Bangalore
Class : Class 7
Answer C

Ans 3:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C because ions help in transmitting radio signals and ions are found in ionosphere.

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SHARANG from DPS KALALI, VADODARA
Subject :NSO    Class : Class 6

Ans 1:

Kushal from Chirec, Hyderabad
Class : Class 7
the answer is b

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Archana from Opg World School, New Delhi
Subject :NSO    Class : Class 4

Ans 1:

Debarpan Das from Delhi Public School , Durgapur
Class : Class 9
The answer is option D

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debadrita pradhan from vivekananda mission school, haldia
Subject :NSO    Class : Class 5

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debadrita pradhan from vivekananda mission school, haldia
Subject :NSO    Class : Class 5

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Gayatri Iyer from Sanskriti School, Pune
Subject :NSO    Class : Class 3

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SHARANG from DPS KALALI, VADODARA
Subject :NSO    Class : Class 6

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ARIJIT SINGH from SAT PAUL MITTAL SCHOOL , Ludhiana
Subject :NSO    Class : Class 5

Ans 1:

Mahadevan from KV Rubber Board Kottayam, Kottayam
Class : Class 9
ans d beacause monarch butterfly migrate to a place and lays eggs and then dies

Ans 2:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is C because salmons born in river amd they go to ocean to stay there. Then, they go back to the river, lays eggs and then dies.

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Yuvana Balasubramanian from NPS International school , Singapore
Subject :NSO    Class : Class 5

Ans 1:

AREEN from BOLTON, HYDERABAD
Class : Class 6
Ans is D because because washing vegetables after peeling and cutting can lead to loss os nutrients and overcooking can lead to affection of taste and it can lead to diseases.

Ans 2:

sauradeep from j v m Shyamali , ranchi
Class : Class 10

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