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Soumil sahu from DPS Chandigarh , Chandigarh
Subject :NSO    Class : Class 6

Rishi performed the following activity:

Rishi came to which one of the following conclusions?

AAir occupies space
BAir has oxygen
CAir has mass
DBoth A and B


Ans 1:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct option is D as of you actually perform it , you will see that water rises by 21% this is as combustion required oxygen which is about 21%in volume . Since it was exhausted , and space occupied air was lowered by 21%. , The water rose . This it proves 1) air has space 2) air has oxygen

Ans 2:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct option is D as of you actually perform it , you will see that water rises by 21% this is as combustion required oxygen which is about 21%in volume . Since it was exhausted , and space occupied air was lowered by 21%. , The water rose . This it proves 1) air has space 2) air has oxygen

Ans 3:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
The correct option is D as of you actually perform it , you will see that water rises by 21% this is as combustion required oxygen which is about 21%in volume . Since it was exhausted , and space occupied air was lowered by 21%. , The water rose . This it proves 1) air has space 2) air has oxygen

Ans 4:

Shourya Ganesh from The Green Acres Academy, Mumbai
Class : Class 9
Thank you jyoti but don't post this message so many times

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