Class 3 Science Composition of Air Worksheet

Last updated on June 28th, 2023 at 11:56 pm

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?

Oxygen

 

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.

 

Answers

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

 

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