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Subjects
Science CBSE
Class 6
Air around us
The air composition and air pollution
12.
Oxygen and its neccessity
Exercise condition:
4
m.
Choose the best options
:
1
.
A person caught with fire is wrapped in a thick woollen blanket so as to
cut off the nitrogen supply
cut off the oxygen supply
cut off carbon dioxide supply
2
. On seeing the picture, answer what does it insist?
Air has oxygen
Air is compressible
Use of air
Air is everywhere
3
.
What does mountaineers carry with them while climbing high mountains?
Oxygen cylinder
Nitrogen cylinder
Gas tube
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