NCERT Solutions for Class 6 Science Chapter 11 Air Around Us
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NCERT Solutions for Class 6 Science Chapter 11 Air Around Us – Text
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Page 1
SOLUTIONS
CLASS - 6TH
aglase .co
Page 2
Class : 6th
Language : English
Subject : Science
Chapter : 15
Chapter Name : AIR AROUND US
Q1 What is the composition of air?
Answer. Air is a mixture of 79% nitrogen, 20% oxygen, 1% carbon dioxide, water vapours
and some other gases. Air also contains dust particles.
Q2 Which gas in the atmosphere is essential for respiration?
Answer. Oxygen is essential for respiration.
Q3 How will you prove that air supports burning?
Answer. Take a candle. Place it in a tub. Light the candle and also �ll the tub with some
water. Cover the candle with an inverted glass. You will �nd that the candle blows out
after burning for some time, and the water level inside the inverted glass rises up to
some extent.
The component, oxygen, of air inside the glass is used up in burning. Therefore, water
occupies that space. This shows that air supports burning.
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Q4 How will you show that air is dissolved in water?
Answer. To show that air is dissolved in water we take water in a pan and heat it. Just
before it boils, you will notice some bubbles at the inner surface of the pan. These
bubbles are formed because of air dissolved in water.
Question 5: Why does a lump of cotton wool shrink in water?
Answer. A lump of cotton wool shrinks when immersed in water. This is because air
present in the cotton wool escapes. Thus, the volume of the cotton wool decreases.
Q6 The layer of air around the Earth is known as __________.
Answer. The layer of air around the Earth is known as atmosphere.
Q7 The component of air used by green plants to make their food is ____________.
Answer. The component of air used by green plants to make their food is carbon dioxide.
Q8 List �ve activities that are possible due to the presence of air.
Answer. (i) Respiration
(ii) Photosynthesis
(iii) Burning
(iv) Movement of sailing yachts, gliders, parachutes, airplanes
(v) Generation of electricity by windmills
Q9 How do plants and animals help each other in exchange of gases in the atmosphere?
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Answer. Plants utilize carbon dioxide present in the atmosphere for the process of
photosynthesis. They release oxygen in the atmosphere. This oxygen is inhaled by
humans and in turn, carbon dioxide is exhaled.
In this way, plants and animals help each other in exchange of gases in the atmosphere.
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Document Details
| Board / Org | NCERT |
| Exam | Class 6 |
| Type | Solution |
| Pages | 4 |
| Updated | 22 Jul 2026 |