Composition of Air Class 3 Worksheet

Composition of Air Class 3 Worksheet

Composition of Air Class 3 Worksheet / Question and Answer for the students of State / CBSE / ICSE school boards by online shiksha

Q – What are the main gases present in the air?

Oxygen carbon dioxide and nitrogen are the main gases present in the air.

Q – What is pollution?

The presence of some harmful substance present in the air is called air pollution.

Q – What are pollutants?

Substances which make the air dirty are called pollutants.

Q – How can we keep the air clean?

We can keep the air clean by following these things.

  • Plant trees
  • Use smoke free lamps and stoves
  • Stop burning garbage
  • Use well maintained vehicles

Q – Why mountaineers carry oxygen cylinders with them?

When we go at upper level the oxygen level in the air decreases, that’s why people carry oxygen cylinders with them.

Q – What is the composition of air ?

Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapors, and some other gases. It also contains dust particles.


Q – Which gas in the atmosphere is essential for respiration?



Fill in the blanks 

  1. The layer of air around the Earth is known as __________. atmosphere
  2. The component of air used by green plants to make their food is ………… gas.
  3. …….. is a mixture of different gases.
  4. ………. do not have any shape of their own.



  1. Atmosphere
  2. Carbon dioxide
  3. Air
  4. Gases



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