Question

What is air.......................?​

Answer 1

Answer:

Air is invisible mixture of gases surrounding the Earth. Air contains most important substances, such as oxygen and nitrogen, that most species need to survive. Human beings, of course, are one of those species. Sometimes the word "atmosphere" is used instead of the word "air".

Answer 2

Answer:

Air is the general name for the mixture of gases that makes up the Earth's atmosphere. This gas is primarily nitrogen (78%), mixed with oxygen (21%), water vapor (variable), argon (0.9%), carbon dioxide (0.04%), and trace gases. Pure air has no discernible scent and no color.