Topics covered in this chapter 15
What is air made of?
How is the oxygen in the atmosphere replaced?
How does oxygen become available to animals and plants living in water and soil?
In this chapter of class 6, you will learn about air and its components. You will also learn about how air is available in the environment in our day-to-day life and how the significant component of human existence (oxygen) is available to plants and animals. Air is present everywhere around us, but do we see air? No. We can only feel the air by wind or breeze or when the leaves of a tree move or when some light object moves or flies. We need air to live on earth.
Air could also be called a clear gas due to which living beings breathe and exist. In simple words, the earth is surrounded by a colour, tasteless, odourless mixture of gases along with tiny dust particles known as air. Since air is a mixture of many compounds, there is a chemical formula for air. Scientifically, due to empty spaces between the molecules of air, it can be compressed to fit in a smaller volume.