Air and its Uses

Here we will learn about air and its uses. All living things need air. We know, air is all around us. We cannot see air but we can feel it. We cannot live without it. 

When we breathe in, we use the oxygen in the air. When we breathe out, the carbon dioxide made in their bodies goes out into the air. We do this all the time.

One day, Sam and Ron caught two beautiful butterflies. They wanted to show these to their friends at school. The next morning they took their bottles to school.

Air and its Uses

They observe that Sam's butterfly is not alive since it did not get enough oxygen but Ron's butterfly is alive. From here we learnt that the air around us contains oxygen, carbon dioxide and water vapour. Along with this it also has dust, smoke and germs. It is polluted. 

When a street is swept, the dust mixes with the air. Dust and smoke from factories mixes with the air. Smoke from cars, buses and trucks mixes with the air.

To avoid this, cars and buses should not give out smoke. They should be checked every month for this. Factories must be built far away from cities. Even there, they should not pollute the air with smoke. 
Sick people cough or sneeze. Germs from their throat and nose mix with the air. We need to cover our face when we cough or sneeze.

After a shower of rain, the dust and the smoke in the air are washed out. Plants give out oxygen while making their food. They also give out water vapour. This keeps the air moist. Growing more trees is one way of keeping the air fresh and clean.

Air and its uses are very important for us to survive but we will be more healthy if we breathe fresh and clean air. 

What does air contains?

Air contains tiny dust particles. Air carries dust when it moves. We can see dust in the air when a beam of light falls into a dark room. Air also has a number of very small living things. They cannot be seen and can harm. They are called germs.

Smoke coming out from vehicles, factories makes the air dirty. Dirty air is harmful for us.

Air has water vapour. In the sun water from seas, rivers and lakes, changes into water vapour. Water of wet clothes also changes into water vapour in the sun. Air has many gases.

What are the properties of air?

The properties of air are:

Air fills things: Blow air into a balloon. It becomes bigger as it is filled with air.

Air has weight: A football full of air is heavier than an empty football because of the air present in it.

Air is needed for burning: A candle burns when kept on a table as it gets air. When it is covered with a glass jar, it blows out, as there is no air.

Air is needed for breathing: Air keeps us alive. All plants and animals need air to breathe.

From where do we get fresh air?

We get fresh air from various places and its very good for our health.

Plants make the air fresh and clean. We know air and its uses so, we must grow more plants to get more fresh air.

Play in the open air.

Keep the windows open to let in fresh air.

Do not cover your face while sleeping.

Note: Impure air is bad for our health.

Second Grade

From Air and its Uses to HOME PAGE

New! Comments

Have your say about what you just read! Leave me a comment in the box below.

Recent Articles

  1. Respiratory Balance Sheet | TCA Cycle | ATP Consumption Process

    Feb 18, 24 01:56 PM

    ATP Synthase in Mitochondria
    The major component that produced during the photosynthesis is Glucose which is further metabolised by the different metabolic pathways like glycolysis, Krebs cycle, TCA cycle and produces energy whic…

    Read More

  2. Electron Transport System and Oxidative Phosphorylation | ETC |Diagram

    Feb 04, 24 01:57 PM

    Electron Transport Chains
    It is also called ETC. Electron transfer means the process where one electron relocates from one atom to the other atom. Definition of electron transport chain - The biological process where a chains…

    Read More

  3. Tricarboxylic Acid Cycle | Krebs Cycle | Steps | End Products |Diagram

    Jan 28, 24 12:39 PM

    Aerobic Respiration
    This is a type of process which execute in a cyclical form and final common pathway for oxidation of Carbohydrates fat protein through which acetyl coenzyme a or acetyl CoA is completely oxidised to c…

    Read More

  4. Aerobic Respiration | Definition of Aerobic Respiration | Glycolysis

    Dec 15, 23 08:42 AM

    Aerobic Respiration
    This is a type of respiration where molecular free oxygen is used as the final acceptor and it is observed in cell. Site of Aerobic Respiration - Aerobic respiration is observed in most of the eukaryo…

    Read More

  5. Fermentation | Definition | Types of Fermentation | Application

    Nov 29, 23 10:27 PM

    Definition of fermentation- It is a process that is energy yielding process of anaerobic oxidation of organic compounds which are carried out by the enzyme action of micro organisms where neither gase…

    Read More