NCERT Solutions for Class 6 Science Chapter 15 Air Around us

NCERT Solutions for Class 6 Science Chapter 15 Air Around us benefits the students in understanding the concepts thoroughly. These NCERT Solutions are prepared by subject experts as per the latest CBSE syllabus.

The questions and the detailed answers to the questions will help you to comprehend the concepts and ideas given in CBSE Class 6 Science examination. To score good marks in the examinations, students are advised to study NCERT Solutions for Class 6 Science.

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 importance of plants for our survival.

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Exercise Questions

1. What is the composition of air?

Solution:

Air comprises water vapour, Oxygen, Nitrogen, Carbon dioxide, dust and smoke.

2. Which gas in the atmosphere is essential for respiration?

Solution:

Oxygen in the atmosphere is essential for respiration.

3. How will you prove that air supports burning?

Solution:

Place two candles of the same length on a table. Light both the candles. Cover one of the candles with an inverted glass tumbler. We observe that the candle covered with a glass tumbler got extinguished after some time, whereas the other candle continued burning. The candle gets extinguished because the component inside of the glass tumbler, which supports burning, is limited. Most of the component is used up by the burning candle. However, the other candle is getting continued supply of air. This component of air, which supports burning, is known as oxygen.

4. How will you show that air is dissolved in water?

Solution:

Take some water in a container. Heat it slowly on a tripod stand. Before water begins to boil, look at the inner surface of the container. We observe tiny bubbles inside. 

These bubbles come from the air dissolved in water. When you heat the water, to begin with, the air dissolved in it escapes. This experiment concludes air is present in the water.

5. Why does a lump of cotton wool shrink in water?

Solution:

The lump of cotton wool shrink in water because the air inside the cotton lumps are replaced by water which makes the layer stick together.

6. The layer of air around the earth is known as ___________.

Solution:

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

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

Solution:

The component of air used by green plants to make their food is carbon dioxide.

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

Solution:

Activities that are possible due to air are:

1. Photosynthesis
2. Cloud formation
3. Respiration
4. Transpiration
5. Winnowing

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

Solution:

During the process of respiration, animals and plants consume oxygen from the air and release carbon dioxide gas in the air. But green plants also release oxygen gas by utilizing carbon dioxide during the process of photosynthesis. Hence, in this way, plants and animals help each other in the exchange of gases in the atmosphere.

Topics covered in NCERT Solutions for Class 6 Science Chapter 15 Air Around us

• Is air present everywhere around us?
• What is air made up of?
• How does oxygen become available to animals and plants living in water and soil?
• How is the oxygen in the atmosphere replaced?

Summary of NCERT Class 6 Science Chapter 15 :

Air is found everywhere. We cannot see air, but we can feel it.
Air in motion is called wind.
Air occupies space.
Air is present in water and soil.
Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and a few other gases. Some dust particles may also be present in it.
Oxygen supports burning and is necessary for living organisms.
The envelope of air that surrounds the earth is known as the atmosphere.
The atmosphere is essential for life on earth.
Aquatic animals use dissolved air in water for respiration.
Plants and animals depend on each other for exchange of oxygen and carbon dioxide from air.

To score good marks in the examination students should solve the previous year question papers and sample papers. This will significantly help the students to determine the difficulty level of the questions and the marking scheme.

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