CBSE Science Class 6 Chapter 11 NCERT Solution - Air Around Us
NCERT Solutions for Class 6 Science Chapter 11 Air Around Us benefits the students in understanding the concepts thoroughly. These NCERT Solutions are prepared by subject-matter experts at TEXTUAL SOLUTION as per the 2023 - 24 CBSE syllabus. This chapter gives knowledge on air, constituents of air, wind, air present in soil and its importance, oxygen and its importance for living organisms, atmosphere and its importance and the importance of plants for our survival.
The questions with their detailed answers will help students to comprehend the concepts and ideas covered in this chapter. Hence, to score good marks in the examinations, students are advised to study NCERT Solutions for Class 6 Science. These NCERT Solutions are really helpful in getting a better understanding of the concepts of air. Moreover, these solutions will help them prepare well and attempt the annual exam confidently.
1. What is the composition of air?
Answer:
Air contains some gases, water vapour and dust particles. The gases in air are mainly nitrogen, oxygen, small amounts of carbon dioxide, and many other gases. Air contains mostly nitrogen and oxygen. These two gases together make up 99% of the air. The remaining 1% is constituted by carbon dioxide and a few other gases, water vapour and dust particles.
2. Which gas in the atmosphere is essential for respiration ?
Answer:
Oxygen.
3. How will you prove that air supports burning ?
Answer:
Two lighted candles are taken. One candle is fixed in a tumbler containing water. This candle is covered by an inverted glass. After some time, the covered candle gets extinguished and water rises upto 1/5th in of the glass. This shows that oxygen is necessary for burning because 1/5th is oxygen. The candle was extinguished as soon as all the oxygen was used up.
4. How will you show that air is dissolved in water ?
Answer:
When a tumbler containing water is heated, tiny bubbles appear on the inner side. These bubbles appear before the water starts boiling. So, these must be air bubbles. This shows that water contains air.
5. Why does a lump of cotton wool shrink in water ?
Answer:
A lump of cotton wool shrink in water because the air inside wool cotton is driven out by water. The layers stick together and hence the lump shrinks.
6. The layer of air around the earth is known as _________.
Answer:
Atmosphere
7. The component of air used by green plants to make their food, is ______
Answer:
Carbon dioxide
8. List five activities that are possible due to the presence of air.
Answer:
- Winnowing
- Formation of clouds
- Respiration
- Photosynthesis
- Transpiration
- Flying of birds
9. How do plants and animals help each other in the exchange of gases in the atmosphere ?
Answer:
During photosynthesis, plants take carbon dioxide and give out oxygen. The animals breath in oxygen in respiration and carbon dioxide is given out which is again used by plants for photosynthesis.
This shows plants and animals help each other in the exchange of gases in the atmosphere.
