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Shweta Garg from Vibgyor high, Vadodara
Subject :NSO    Class : Class 6

Read the following statements.
(i) Air dissolved in water cannot be removed from it.
(ii) Density of air decreases with increasing altitude.
(iii) Air is an element that surrounds the Earth and makes it hospitable for living organisms.
(iv) Air helps in pollination of several flowers and in the dispersal of seeds.
Which of the above statements are correct?

A (i) and (ii) only
B (ii) and (iv) only
C (i) and (iii) only
D (iii) and (iv) only


Ans 1:

Siddhani Nayak from DPS Paradip Refinery, Paradip
Class : Class 6

Ans 2:

Kavyam Rustagi from Delhi Public School, Ethalbari , Binnaguri
Class : Class 4

Ans 3:

Souradeepto Das Mandal from Hyderabad Public School, Hyderabad
Class : Class 6

Ans 4:

Kanishk Mukherjee from BDM International, Kolkata
Class : Class 6

Ans 5:

Deeptajit Roy from Gems Modern Academy, Dubai
Class : Class 10
answer is D, air density decreases on increse in height

Ans 6:

Manaswini Aradhyula from DELHI PUBLIC SCHOOL BANGALORE EAST, Bengaluru
Class : Class 7

Ans 7:

Nuvin Khanna from Mount Olympus School, Gurgaon
Class : Class 6

Ans 8:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Answer is D.

Ans 9:

A S Neeraj from K V 2, Chennai
Class : Class 6
No ans is not D it's B because air is a mixture not an element.

Ans 10:

SOUVAGYA SAHA from De Nobili School, DHANBAD
Class : Class 10
ans is not option D as air is not an element , air is a mixture of many elements and compounds......further more statement 2 is correct as air density decreases with increasing altitude i.e air density decreases with increase in height

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