General Knowledge - General Science - Discussion

consist of several gases

As well water vapour, sand, and alot of various things.

An air is the mixure of diferent gases.

In all the books suggest that:

"AIR IS A MIXTURE OF GASES PRESENT IN ATMOSPHERE."

Compound mean?

Air is a mixture of various gases. The main gases present in air are nitrogen (78.1% by volume) and oxygen (20.9% by volume). These two gases together form 99% of the air. Besides these two, air contains small amounts of carbon dioxide (0.03 to 0.04%), water vapour (variable), noble gases (0.94%), and dust particles. The noble gases present in the air are helium, neon, argon, krypton and xenon. Since the percentage of these gases is very small so, they are also called "Rare gases".

The moving air is called wind. Air is needed for life. We cannot live without air. We breathe in air through nose. Air is needed for all living things like plants, animal, human beings etc.

Because it consists of different types of gases.

Air is an mixture of dust, CO2, NO2, SO2, O2 etc.

Air is mixture gas they mixture all gases. Air is most needed by human beings.