Class 6 Science Air Around Us – Get here the Notes, Question & Practice Paper of Class 6 Science for topic Air Around Us Notes. Air Around Us Notes for Class 6 Science are here. You can download the Air Around Us Notes PDF to study all the topics in this chapter. Moreover the Class 6 Science notes include chapter summary, definitions, examples, and key pointers for Air Around Us. Thus if you are studying class Science (विज्ञान), then the Air Around Us notes will help you easily understand the topic and ace it.
Class 6 Science Notes for Air Around Us
Air Around Us is a critical part in the study of Science. In India, it is taught in class. Therefore the Class 6 Notes for Science topic Air Around Us have been compiled by teachers and field experts. They explain the complete chapter of Air Around Us in one-shot.
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Air Around Us Notes for Class 6 Science
Air Around Us Class 6 notes is as follows. You can view the document here and also download it use it anytime for future reference whenever you want to brush up your concepts of Science.
Chapter 11 – Air Around Us
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All Topics Class 6 Science Notes
Chapter wise notes for Science (विज्ञान) are given below.
- Components of Food
- Sorting Material into Groups
- Separation of Substances
- Getting to Know Plants
- Body Movement
- The Living Organisms Characteristics and Habitats
- Motion and Measurement of Distances
- Light, Shadows and Reflection
- Electricity and Circuits
- Fun with Magnet
- Air Around Us
Class 6 Notes for All Subjects
NCERT Solutions for Class 6 Science Air Around Us
The Air Around Us notes here help you solve the questions and answers. Also, you can complete the Class 6 Air Around Us worksheet using the same. In addition you will also tackle CBSE Class 6 Science Important Questions with these Class 6 notes.
Chapter 11 – Air Around Us
Atmosphere: The thin blanket of air surrounding the surface of the Earth is called the atmosphere.
The atmosphere is divided into five distinct layers on the basis of variations in temperature that changes due to increasing altitude. Air gets scant as we move up in the atmosphere. These are as follows:
- Troposphere: This is the first layer to the atmosphere which is nearest to the surface and is responsible for weather conditions. The troposphere itself is said to contain about more than 75% of the atmosphere!
- Stratosphere: This is the layer just above the troposphere which contains the ozone layer and where the aeroplanes fly and is also home to most of the clouds!
- Mesosphere: This is the third and the coldest layer of our atmosphere and extends to a good 80 km above the surface of the Earth.
- Thermosphere: This is the fourth and one of the hottest layers of Earth where temperatures go to a 1500o this is where the space shuttles go to study Earth from space! The air in this layer is very thin and about 99.9% of the atmosphere is said to lie below this particular layer.
- Exosphere: This is the outermost layer of the atmosphere where molecules and atoms escape into space. Beginning at 480 km above the Earth, this layer then extends into the space.
Constituents of Air
Air is a mixture of a number of gases and some other particles such as:
- Water Vapour: Air contains water vapour which helps maintain the water cycle. When air comes in contact with cold surfaces, it is these vapours that turn into or condense into droplets of water. The amount of water vapours in the air from place to place and time to time. At a normal 30°C for instance can contain say up to 4% of water vapour.
- Oxygen: It is the oxygen in the air that helps humans and animals carry out the respiration process. Oxygen is also required for fire to keep burning. If we were to keep an inverted tumbler covering a burning candle, the candle will go off in a few seconds because of the lack of oxygen-containing air due to the tumbler. Dry air is said contain about 21% of oxygen.
- Nitrogen: Dry air is said to contain about 78% of nitrogen. This component of air helps plants in their growth process.
- Carbon dioxide: Carbon dioxide is a very small (only 0.04%) component of air and is a byproduct of respiration by humans and animals. Fire also uses up oxygen to burn and then produces carbon dioxide and a few other gases upon burning. This is why we feel suffocated if there is something burning inside a room. This happens due to an excess of carbon dioxide as the fire continues to burn in the room, choking out oxygen in the air.
- Dust and Smoke: Smoke is another component given out when fire burns. It is very harmful and adds fine dust particles and a few other gases to the air.
As we can see from the Figure above, Oxygen and nitrogen together make up 99% of air while the other components come up to a mere 1% of all air in our environment.
Availability of Oxygen in Water and Soil
It is often asked how animals under the soil and in water are able to breathe. The answer is that both soil and water have air dissolved in them.
- When we heat or boil water, we often notice that bubbles start to form. These bubbles are in fact, an indication that air molecules are present in the water. When water is heated, the air dissolved in it escapes first followed by water itself getting converted into vapour. This is how animals living underwater are able to respire.
To see the presence of water in the soil, we take a small lump of it in a beaker and add water to it. We see bubbles coming out of it which as we discussed, is proof of the existence of air molecules in the soil. As water is added, it displaces the water molecules in the soil which we see in the form of bubbles. Animals make use of this air to breathe under the soil. Some animals make holes and burrows in the soil to help make pathways for air to enter the soil. When it rains heavily, earthworms and other animals come out of the soil because these pathways get blocked by the water and they need to come outside to find the air to breathe.
Balance of Oxygen in the Atmosphere
It is common knowledge that humans and animals can‘t survive without plants because they produce oxygen via photosynthesis. The balance of oxygen in the environment is thus maintained through the respiratory processes of plants and animals.
The importance of Air
Air has a number of uses:
- The air which is in motion is known as wind. The wind is important for the rotation of windmills which help in drawing water from tube wells.
- They also help in running flour mills.
- Windmills are also used to produce electricity.
- Insects and birds are only able to fly because of the presence of air
- Boats, yachts, aeroplanes and parachutes also need air to sail and glide
- Air has a very important role to play in the water cycle as well.
- It also helps in distributing the pollen and seeds from flowers of various plants.
However if you still need help, then you can use the NCERT Solutions for Class 6 Science Air Around Us to get all the answers. Air Around Us solutions contain questions, answers, and steps to solve all questions.
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Air Around Us Notes for Class 6 Science – An Overview
| Name of Topic | Air Around Us |
| Class | 6 |
| Subject | Science |
| All Class 6 Science Notes | Class 6 Science Notes |
| All Class 6 Notes | Class 6 Notes |
Class 6 Air Around Us Notes for All Boards
You can use the Class 6 Science notes of Air Around Us for all boards.
The education boards in India for which Air Around Us notes are relevant are – CBSE, CISCE, AHSEC, CHSE Odisha, CGBSE, HBSE, HPBOSE, PUE Karnataka, MSBSHSE, PSEB, RBSE, TBSE, UPMSP, UBSE, BIEAP, BSEB, GBSHSE, GSEB, JAC, JKBOSE, KBPE, MBOSE, MBSE, MPBSE, NBSE, DGE TN, TSBIE, COHSEM, WBCHSE.
Therefore you can refer to these notes as CBSE, CISCE, AHSEC, CHSE Odisha, CGBSE, HBSE, HPBOSE, PUE Karnataka, MSBSHSE, PSEB, RBSE, TBSE, UPMSP, UBSE, BIEAP, BSEB, GBSHSE, GSEB, JAC, JKBOSE, KBPE, MBOSE, MBSE, MPBSE, NBSE, DGE TN, TSBIE, COHSEM, WBCHSE notes for class Class 6 / Class / Science for the topic Air Around Us.
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