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Class 6 - Science

Air Around Us

Q&A
Question:

Name a device which uses wind energy to generate electricity.

Answer:

Windmills use the wind energy to convert wind energy into electrical energy.



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Questions and Answers


Air Around Us - Questions
1.

Name the main component of air.


Answer
2.

Name a device which uses wind energy to generate electricity.


Answer
3.

Explain why mountaineers carry oxygen cylinders with them?


Answer
4.

Which gas in the atmosphere is essential for respiration?


Answer
5.

Why is air considered as a mixture?


Answer
6.

What is wind energy? Mention its two advantages.
 


Answer
7.

Name the main component of air.


Answer
8.

Name the main component of air.


Answer
9.

What is the source of oxygen gas in air?


Answer
10.

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


Answer
11.

Name a device which uses wind energy to generate electricity.


Answer
12.

Mention two uses of air.


Answer
13.

Mention one necessary condition for the combustion to take place.
 


Answer
14.

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


Answer
15.

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


Answer
16.

What is the percentage of nitrogen in air?
 


Answer
17.

What is the source of carbon dioxide in air?


Answer
18.

Describe balance of oxygen in the air.


Answer
19.

What is the percentage of oxygen in air?
 


Answer
20.

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


Answer
21.

Why does a lump of cotton wool shrink in water?


Answer
22.

Air is a mixture. Prove this statement.


Answer
23.

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


Answer
24.

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


Answer
25.

What is wind energy? Mention its two advantages.
 


Answer
26.

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


Answer
27.

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


Answer
28.

What is the composition of air?


Answer
29.

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


Answer
30.

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


Answer
31.

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


Answer
32.

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


Answer
33.

How will you show that air is dissolved in water?
 


Answer
34.

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


Answer
35.

Why is carbon-dioxide gas used to extinguish fire?


Answer
36.

How will you show that air supports burning?


Answer
37.

How will you prove that soil contains air in it?


Answer
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