NCERT Solutions Class 6 Science
The NCERT Solutions in English Language for Class 6 Science Chapter – 15 (Air Around Us) has been provided here to help the students in solving the questions from this exercise.
Chapter – 15 (Air Around Us)
1. What is the composition of air?
Answer – The composition of air are water vapour, Oxygen, Nitrogen, Carbon dioxide, dust and smoke.
2. Which gas in the atmosphere is essential for respiration?
Answer – Oxygen in the atmosphere is essential for respiration.
3. How will you prove that air supports burning?
Answer – Take a small burning candle. Cover the burning candle with a glass jar. After few minutes the candle is extinguished. As the supply of air is stopped due to glass jar the burning of candle is also stopped. This experiment proves that air supports burning.
4. How will you show that air is dissolved in water?
Answer – Take some water in a glass vessel or beaker. Heat it slowly on a tripod stand. Before the water begins to boil, look carefully at the inner surface of the vessel. You will see tiny bubbles on the inside. On heating, air dissolved in water escapes in the form of these bubbles.
5. Why does a lump of cotton wool shrink in water?
Answer – The lump of cotton wool shrink in water because the air inside the cotton lumps are replaced by water which makes the layer stick together.
6. The layer of air around the earth is known as ___________.
Answer – The layer of air around the earth is known as the atmosphere.
7. 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.
8. List five activities that are possible due to the presence of air.
Answer – Activities that are possible due to air are:
1. Photosynthesis
2. Cloud formation
3. Respiration
4. Transpiration
5. Winnowing
9. How do plants and animals help each other in the exchange of gases in the atmosphere?
Answer – Animals and plants use oxygen from air during respiration and release carbon dioxide gas in air. But green plants also release oxygen gas by using carbon dioxide during photosynthesis. Thus, we can say that animals and plants help each other in exchange of gases.
NCERT Solutions for Class 6 Science
- Chapter 1 – Food Where Does It Come From
- Chapter 2 – Components of Food
- Chapter 3 – Fibre to Fabric
- Chapter 4 – Sorting Materials Into Groups
- Chapter 5 – Separation of Substances
- Chapter 6 – Changes Around Us
- Chapter 7 – Getting to Know Plants
- Chapter 8 – Body Movements
- Chapter 9 – The Living Organisms and Their Surroundings
- Chapter 10 – Motion and Measurement of Distances
- Chapter 11 – Light, Shadows and Reflection
- Chapter 12 – Electricity and Circuits
- Chapter 13 – Fun with Magnets
- Chapter 14 – Water
- Chapter 16 – Garbage In, Garbage Out
