science - air around us

Class 6 - Science

Air Around Us

Q&A
Question:

How will you show 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
ncert-solutions-for-class-6th-science-chapter-15-air-around-us-1



--- >>>

Questions and Answers


Air Around Us - Questions
1.

Name the main component of air.


Answer
2.

Which gas in the atmosphere is essential for respiration?


Answer
3.

Name a device which uses wind energy to generate electricity.


Answer
4.

What is the percentage of oxygen in air?
 


Answer
5.

Mention one necessary condition for the combustion to take place.
 


Answer
6.

What is wind energy? Mention its two advantages.
 


Answer
7.

The layer of air around the earth is known as………………….


Answer
8.

Name the main component of air.


Answer
9.

Why is air considered as a mixture?


Answer
10.

What is the percentage of nitrogen in air?
 


Answer
11.

Name the major gas present in the (a) inhaled air (b) exhaled air.


Answer
12.

Name a device which uses wind energy to generate electricity.


Answer
13.

Mention two uses of air.


Answer
14.

What happens if the percentage of carbon-dioxide increases in the air?


Answer
15.

Why does a lump of cotton wool shrink in water?


Answer
16.

Describe balance of oxygen in the air.


Answer
17.

What happens if the percentage of oxygen in the air reaches to 70%?


Answer
18.

What is wind energy? Mention its two advantages.
 


Answer
19.

Name the main component of air.


Answer
20.

What is the source of oxygen gas in air?


Answer
21.

You must have seen during rainy season, when it rains the animals like earthworm, snakes, snails etc. are commonly seen. Explain why?


Answer
22.

How will you prove that soil contains air in it?


Answer
23.

What is the source of carbon dioxide in air?


Answer
24.

Explain why mountaineers carry oxygen cylinders with them?


Answer
25.

Air is a mixture. Prove this statement.


Answer
26.

The component of air used by green plants to make their food, is………………….


Answer
27.

How do plants and animals help each other in exchange of gases in the atmosphere?


Answer
28.

What is the composition of air?


Answer
29.

Write the necessary conditions for rusting of iron to take place.


Answer
30.

Why do we see the sky and air clear and clean after rainfall?


Answer
31.

How will you show that air is dissolved in water?
 


Answer
32.

Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.


Answer
33.

Demonstrate through a simple experiment that the air mainly contains nitrogen and oxygen in the volume ratio of 4: 1.


Answer
34.

List five activities that are possible due to presence of air.


Answer
35.

What is air? Name the major constituents of air. Also give their volume proportions in air.


Answer
36.

Why is carbon-dioxide gas used to extinguish fire?


Answer
37.

How will you show that air supports burning?


Answer