MEDIUM
5th CBSE
IMPORTANT
Earn 100

Why do mountaineers carry oxygen cylinders with them?

Important Questions on Air

EASY
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 1

Choose from the following:

(rocks, ice, water vapour, oil)

Air is made up of gases, some _____ and dust particles.

EASY
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 2
The amount of water vapour in the air is known as _____.
EASY
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 3
The layer of atmosphere in which all weather changes takes place is known as _____.
MEDIUM
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 4
_____ gas is filled in glow signs. (Helium/ Neon)
MEDIUM
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 5
Aeroplanes go up in the air because of _____. (gravity/ air pressure)
HARD
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 6
_____ is the layer of the atmosphere that helps radio to work.
EASY
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 7
Nearly three-fourth of the air is _____ gas. (oxygen/ nitrogen/ helium)
MEDIUM
5th CBSE
IMPORTANT
SCIENCE>Chapter 9 - Air>EXERCISES>Q 8
_____ prevents harmful rays of the sun from reaching us. (Ionosphere/ Ozone/ Thermosphere)