Write few propites of air ?

Some common properties are as follows:

• Colorless and odourless: Air generally has no color or odour. It is an invisible matter that can only be felt. All living things breathe air for their survival. Moving air is called the wind.

• Occupy space: It is a mixture of different gases. Hence, like every other matter, they also occupy space. On blowing, a balloon expands because the air being blown into it fills in the empty space.
• Air exerts pressure: It has weight, and the pressure exerted by the weight of air is known as air pressure. Due to gravity, this mixture of gases near the surface is denser than at high altitudes. This is why the gaseous atmosphere in mountains is thinner than that at the surface.
• Expansion: Another property is its expanding property. On heating, it expands and occupies more space. More it expands, more it becomes thinner. Hence, the pressure of warm wind is lower than that of cold wind.