RBSE Solutions for Class 6 Science Chapter 11 - Air Around Us
Rbse Class 6 Science solution

RBSE Solutions for Class 6 Science Chapter 11 – Air Around Us

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In Class 6 Science Chapter 11of RBSE, titled “Air Around Us,” students will learn about the importance of air, its components, and how it supports life on Earth. The chapter explores the properties of air, the gases that make it up, and the role air plays in sustaining life. This chapter is fundamental for understanding the Earth’s atmosphere and the vital functions air performs in our daily lives.

RBSE Solutions for Class 6 Science Chapter 11 - Air Around Us

RBSE Solutions for Class 6 Science Chapter 11 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 candles. Cover one of the candles with an inverted glass tumbler. We can observe that the candle covered with the glass tumbler got extinguished after some time, whereas the other candle continued burning. The candle gets extinguished because the air 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 a continuous 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 the 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 that 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 is 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:

The five activities that are possible due to air are as follows:

  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 into the air. Besides, green plants also release oxygen gas by utilising 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.

Key Topics Covered in Chapter 11: Air Around Us

  1. What is Air?
    • Air is the mixture of gases that surrounds the Earth and is essential for the survival of living organisms.
    • It is invisible, odorless, and occupies space. Air is present everywhere and has mass.
  2. Composition of Air
    • Air is composed of several gases, primarily:
      • Nitrogen (78%): The largest component of air.
      • Oxygen (21%): Essential for respiration and combustion.
      • Carbon dioxide (0.03%): Necessary for photosynthesis in plants.
      • Other gases (neon, argon, etc.): Present in trace amounts.
    • Air also contains water vapor, which varies depending on the temperature and weather conditions.
  3. Properties of Air
    • Air has mass: Even though we can’t see air, it has weight and can exert pressure.
    • Air can be compressed: Air can be squeezed into smaller spaces, which is the principle behind balloons and inflating tires.
    • Air occupies space: Air fills up any container, and this property is crucial for understanding how gases behave.
    • Air can exert pressure: The weight of the air in the Earth’s atmosphere creates pressure, which is observed as atmospheric pressure.
  4. Importance of Air
    • For breathing: Air contains oxygen, which is vital for the respiration of humans and animals.
    • For combustion: Oxygen in the air supports burning, which is important for many human activities.
    • For weather: Air is a key factor in the formation of weather patterns and the climate of regions.
    • For plant growth: Air contains carbon dioxide, which is essential for photosynthesis in plants.
  5. Air and Its Role in Nature
    • The movement of air, known as wind, plays an important role in distributing heat, moisture, and other elements across the planet, affecting the Earth’s climate.
    • The water cycle is also influenced by air, as it carries water vapor that forms clouds and eventually leads to precipitation.

RBSE Class 6 Science Chapter 11 Solutions

Q1. What is air?

  • Answer: Air is the mixture of gases, including nitrogen, oxygen, carbon dioxide, and other gases, along with water vapor. It surrounds the Earth and is essential for the survival of living organisms.

Q2. What are the major components of air?

  • Answer: The major components of air are:
    • Nitrogen (78%)
    • Oxygen (21%)
    • Carbon dioxide (0.03%)
    • Other gases (neon, argon, etc.) in small amounts.
    • Water vapor, which varies depending on the weather.

Q3. Why is oxygen important?

  • Answer: Oxygen is essential for the respiration of living organisms, including humans and animals. It is also necessary for combustion, a process used in many human activities.

Q4. How does air support life on Earth?

  • Answer: Air supports life by providing oxygen for respiration and carbon dioxide for photosynthesis in plants. It also plays a role in maintaining the Earth’s climate and supporting various natural processes like the water cycle.

Q5. What are the properties of air?

  • Answer: The properties of air include:
    • Air has mass and occupies space.
    • Air can be compressed.
    • Air exerts pressure.
    • Air can move and create wind, affecting the climate and weather patterns.

FAQs for RBSE Class 6 Science Chapter 11

1. Why is air important for life?

Answer: Air is essential for breathing as it contains oxygen, which is needed for the respiration of humans and animals. Air also provides carbon dioxide for plants to perform photosynthesis, and it plays a role in weather patterns.

2. What is the composition of air?

  • Answer: Air is composed of:
    • 78% nitrogen
    • 21% oxygen
    • 0.03% carbon dioxide
    • Trace amounts of other gases like neon and argon.
    • It also contains water vapor.

3. How does air support the water cycle?

  • Answer: Air carries water vapor that rises, condenses into clouds, and eventually leads to precipitation, forming the water cycle.

4. What is atmospheric pressure?

  • Answer: Atmospheric pressure is the force exerted by the weight of the air above us. It is caused by the mass of air in the Earth’s atmosphere pushing down on the Earth’s surface.

5. How does air affect weather?

  • Answer: Air movement, or wind, plays a crucial role in shaping weather patterns by distributing heat and moisture across the planet. The temperature and humidity of the air affect precipitation, cloud formation, and the overall climate.

Conclusion

Chapter 15: Air Around Us helps students understand the essential role air plays in sustaining life on Earth. From its composition and properties to its importance in breathing, plant growth, and weather patterns, air is vital for all life forms. This chapter encourages students to appreciate the significance of air and how it interacts with the environment.

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