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VR Tour For Std. 6 Ch. 15: Air around Us

What's Included in Virtual tour of this chapter

All living organisms need air for their survival. But have you ever seen air? Though we cannot see the air, we can feel its presence in different ways. Air is made up of many substances. Air is a mixture of many gases. Vehicles release smoke which causes air pollution and small particles of dust that are present everywhere in the air. The smoke, coming out from the vehicles, contains harmful gases. Oxygen which is the base for survival is present in the air, water, and soil. The Air is a mixture of nitrogen, oxygen, Argon, carbon dioxide, water vapor, and a few other gases. Some dust particles are also present in it. Green plants take carbon dioxide and release oxygen during photosynthesis. This is how the balance of CO2 and O2 is maintained in the atmosphere.

Virtual tour 1 Presence of air around us

Virtual tour 1: Presence of air around us

Air occupies space. Air does not have any color and is transparent. But how can something invisible occupy space? We will learn this with the help of an experiment. Even an empty bottle is filled with air and the air from the bottle comes out in the form of bubbles when dipped in a beaker full of water.

Virtual tour 2 Presence of oxygen in air

Virtual tour 2: Presence of oxygen in air

Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapor, and a few other gases. Some dust particles are also found in it. When the air is in motion it’s called wind. As we all know, oxygen is essential for combustion. Nothing can be burnt in the absence of it. We will perform an experiment in this virtual tour to understand the presence of oxygen in the air.

Virtual tour 3 Presence of dust and smoke in air

Virtual tour 3: Presence of dust and smoke in air

The smoke, coming out of vehicles, contains harmful gases like sulfur dioxide. It also contains some harmful dust particles. The presence of dust particles in the air varies from time to time, and from place to place. So it is advised to use a handkerchief or mask in traffic areas to cover your nose and mouth in order to prevent harmful dust particles from entering your body.

Virtual tour 4 Presence of air in water and soil

Virtual tour 4: Presence of air in water and soil

Oxygen is present in the air. So the organisms, which are living on the land, can take oxygen directly from the air. Oxygen is also present in water and soil. Animals living in soil and water use this oxygen in breathing. So, the aquatic animals and plants use the dissolved oxygen in the water. Air spaces, between soil particles, contain oxygen. The organisms that live inside the soil use this oxygen.

Virtual tour 5 Components of air

Virtual tour 5: Components of air

The gas which comprises the most amount in air is Nitrogen. Air contains about 78 percent of nitrogen. Dry air contains about 21 percent of oxygen. It is also colorless, odorless, and tasteless, diatomic gas. Other components that are present in the air are argon gas and carbon dioxide which comprise a very small component of air. CO2 is released by humans and other animals during respiration.

Virtual tour 6 The Balance of oxygen and carbon dioxide in the air

Virtual tour 6: The Balance of oxygen and carbon dioxide in the air

Green plants take carbon dioxide and release oxygen during photosynthesis. On the other side, living organisms take oxygen and release carbon dioxide into the atmosphere. In this way, the green plants help to maintain the balance of carbon dioxide and oxygen in the atmosphere

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