what is air? how it is work
Answers
Explanation:
1) the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
2) an impression of a quality or manner given by someone or something.
3) a tune or short melodious song.
4) a jump off the ground on a snowboard or skateboard.
These are the meanings for air.
Answer:
Air is a fluid Which is present in ATMOSPHERE OF EARTH
EXPLAINATION :
Air is as valuable to life as it is invisible to the naked eye. Humans can only live for a few minutes without it. Adult human beings take in an average of over 800 breaths of air per hour at rest, or 20,000 breaths a day, which amounts to 35 pounds of air. The Earth's atmosphere is responsible for keeping air from escaping into space, while most of the oxygen, the breathable gas life forms on Earth need, is produced by plants. Air quality can be threatened by air pollution, either from natural events like volcanoes or by man-made industries and machines that burn fossil fuels. Learning about the nature and the value of air is essential to understanding its true value.
What is Air?
Air, or more importantly the oxygen that it contains, is the most important resource on Earth for human beings and almost all species of plants and animals, including fish. Without water, a person can survive for perhaps a few days, but without air, a person will die in mere minutes, as will most other living things. Despite the fact that it can't be seen, air has mass, and it exerts pressure, which is called air pressure. Air is made up of primarily nitrogen, at 78 percent, and oxygen, which makes up around 21 percent, and then other gases, such as carbon dioxide and argon. Living things are sensitive to changes in the makeup and quality of air. For instance, too little oxygen can result in death by asphyxiation, while too much oxygen means that the air will become toxic.