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Answer :

A lump of cotton wool shrinks in water because the air inside wool cotton is driven out by water. The layers stick together and hence lump shrinks.

- Q.1 What is the composition of air?
- Q.2 Which gas in the atmosphere is essential for respiration?
- Q.3 How will you prove that air supports burning?
- Q.4 How will you show that air is dissolved in water?
- Q.6 The layer of air around the earth is known as ___________.
- Q.7 The component of air used by green plants to make their food, is ___________.
- Q.8 List five activities that are possible due to the presence of air.
- Q.9 How do plants and animals help each other in the exchange of gases in the atmosphere?

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- NCERT solutions for class 6 maths chapter 2 Whole Numbers
- NCERT solutions for class 6 maths chapter 3 Playing with Numbers
- NCERT solutions for class 6 maths chapter 4 Basic Geometrical Ideas
- NCERT solutions for class 6 maths chapter 5 Understanding Elementary Shapes
- NCERT solutions for class 6 maths chapter 6 Integers
- NCERT solutions for class 6 maths chapter 7 Fractions
- NCERT solutions for class 6 maths chapter 8 Decimals
- NCERT solutions for class 6 maths chapter 9 Data Handling
- NCERT solutions for class 6 maths chapter 10 Mensuration
- NCERT solutions for class 6 maths chapter 11 Algebra
- NCERT solutions for class 6 maths chapter 12 Ratio and Proportion
- NCERT solutions for class 6 maths chapter 13 Symmetry
- NCERT solutions for class 6 maths chapter 14 Practical Geometry

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- NCERT solutions for class 6 science chapter 11 Light, Shadows and Reflections
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- NCERT solutions for class 6 science chapter 15 Air Around us