science - air around us

Class 6 - Science

Air Around Us

Q&A
Question:

Name the main component of air.

Answer:

Nitrogen gas



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Questions and Answers


Air Around Us - Questions
1.

Name the main component of air.


Answer
2.

Name the main component of air.


Answer
3.

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


Answer
4.

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


Answer
5.

Why is air considered as a mixture?


Answer
6.

What is wind energy? Mention its two advantages.
 


Answer
7.

Mention two uses of air.


Answer
8.

Describe balance of oxygen in the air.


Answer
9.

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


Answer
10.

What is the percentage of nitrogen in air?
 


Answer
11.

What is the source of carbon dioxide in air?


Answer
12.

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


Answer
13.

Mention one necessary condition for the combustion to take place.
 


Answer
14.

Name a device which uses wind energy to generate electricity.


Answer
15.

Name a device which uses wind energy to generate electricity.


Answer
16.

What is wind energy? Mention its two advantages.
 


Answer
17.

How will you prove that soil contains air in it?


Answer
18.

Explain why mountaineers carry oxygen cylinders with them?


Answer
19.

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


Answer
20.

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


Answer
21.

Air is a mixture. Prove this statement.


Answer
22.

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


Answer
23.

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


Answer
24.

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


Answer
25.

Name the main component of air.


Answer
26.

What is the source of oxygen gas in air?


Answer
27.

Which gas in the atmosphere is essential for respiration?


Answer
28.

What is the percentage of oxygen in air?
 


Answer
29.

How will you show that air is dissolved in water?
 


Answer
30.

Why does a lump of cotton wool shrink in water?


Answer
31.

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


Answer
32.

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


Answer
33.

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


Answer
34.

Why is carbon-dioxide gas used to extinguish fire?


Answer
35.

What is the composition of air?


Answer
36.

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


Answer
37.

How will you show that air supports burning?


Answer
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