NCERT Class 6 Science – Air Around Us Chapter 15 Question Answer for Preparation of Exams. Here we Provide Class 6 Vigyan Question Answer, Important Questions, for Various State Boards Students like CBSE, Haryana, uttar pradesh, mp and other state students.
Also Read : – Class 6 Science NCERT Solution
NCERT Class 6 Science Chapter 15 Air Around Us Textual Question Answer Solution.
Air Around Us Class 6 Science Chapter 15 Question Answer
Textual Questions and Answer for Easy to Understand the Chapter of Science.
Q.1. What is the composition of air ?
Ans. Composition of Air. Air is a mixture of many gasses such as :
Carbon Dioxide :- 0.03%
Dust particles and other gases- 0.57%
Q. 2. Which gas in the atmosphere is essential for respiration?
Ans. Oxygen gas in the atmosphere is essential for respiration.
Q. 3. How will you prove that air supports burning ?
Ans. Take a candle and put it in tub. The candle is lighted by using a burning match stick. The candle will continue to burn in this case. This is because air is continuously available to the candle for its burning process.
Now, cover the burning candle by putting an inverted glass over it. After a short time, the candle stops burning. It get extinguished (see figure). This can be explained as-when the burning candle is covered with glass then the candle takes the oxygen necessary for burning from the air enclosed in glass. Since only a small amount of oxygen is available in the glass which is used short time then the burning candle gets extinguished. Thus when a burning candle is covered with glass then the fresh supply of air to the candle is cut off, hence, it stops burning. From this experiment, we conclude that air is necessary for burning.
Q. 4. How will you show that air is dissolved in water ?
Ans. Take some water in a glass vessel. Heat it slowly on a tripod stand. Well before the water begins to boil, look carefully at the inner surface of vessel. The tiny bubbles appear inside before water starts boiling. So there must be air present in water and which appears as bubbles.
This shows that water contains air in it.
Q. 5. Why does a lump of cotton wool shrink in water ? water
Ans. When water is poured on a lump of cotton, the air trapped in it gets displaced and appears in the form of bubbles with the result no air space is left between the glass wool. In this way the size of the lump decreases and it shrinks.
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 ………..
Ans. Carbon dioxide.
Q. 8. List five activities that are possible due to the presence of air.
Ans. (i) Air moves the wind mill.
(ii) Air helps in moving glider, parachutes, aeroplane and boats.
(iii) Bats, Birds and insects fly only due to air.
(iv) Air helps in dispersal of pollens and seeds.
(v) Air is life because all living organisms breathe in air.
Q. 9. How do plants and animals help each other in the exchange of gases in the atmosphere ?
Ans. Air contains both, oxygen gas and carbon dioxide gas. Plants do photosynthesis and use carbon dioxide of the air and produce oxygen. Oxygen is used by animals for respiration and carbon dioxide gas is produced which goes into the air and is used by plants. Hence by exchange of gases, plants and animals survive.