National Science Olympiad Forum By SOF Olympiad Trainer - Page 148
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Aaratrik Chakraborty from Delhi Public School, Bhilai, Bhilai
Subject :NSO    Class : Class 6

Ans 1:

Islaah Shakil from Genius National School , Kolkata
Class : Class 7

Ans 2:

Khushal from Oxford English Medium School, Chopda, Chopda
Class : Class 7
thanks for reporting our mistakes

Ans 3:

Shreyansh from KKIS, Singapore
Class : Class 7
I think the answer is somewhat "D"

Ans 4:

Adwita Pandey from Bhavan's Gangabux Kanoria Vidyamandir, Kolkata
Class : Class 7
The answer should be D because the soil that takes the most time to let the water pass through retains water for the longest time. Since mangroves are usually found in the clayey soil, D is the correct one.

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john from KV PORT TRUST , Ernakulam
Subject :NSO    Class : Class 10

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Surat Kumar from REI , Dayal Bagh agra
Subject :NSO    Class : Class 10

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tanay from nps, bengaluru
Subject :NSO    Class : Class 6

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apra from dps, Noida
Subject :NSO    Class : Class 8

Ans 1:

arnav raj sharma from gulibulium school, new york
Class : Class 8
the first ones area is a and the second's one is 16a so the pressure will be 16p

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Punya Paras Sundrani from Anand Niketan , Ahmedabad
Subject :NSO    Class : Class 6

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rethish from Veltech, Avadi
Subject :NSO    Class : Class 7

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Aarav Kalia from Apeejay School, Pitampura, Delhi
Subject :NSO    Class : Class 9

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Amlan choudhury from GD Birla center for education , Kolkata
Subject :NSO    Class : Class 7

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SOMDATTA BHATTACHARYA from Delhi Public School, Dhaligaon, Bongaigaon
Subject :NSO    Class : Class 9

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