Air is the invisible mixture of gases that surrounds Earth, containing important substances like oxygen and nitrogen, and holding water vapor. As altitude increases, the composition of air changes. The majority of the atmosphere is made up of oxygen and nitrogen, and air also serves as a protective cushion for our planet.
Air Movement and Pollution
Life is present in air, which can move across great distances rapidly. Unfortunately, air pollution can adversely affect our outdoor activities.
Air as a Noun and Matter
Air is considered matter since it occupies space and has mass, fulfilling the criteria of matter.
Air is a common, concrete, material noun that names the invisible gases around us.
Compound Words and Air
Compound Words for Air:
- airborne
- airline
- airplane
Closed-form compound words, like "airport," are joined without hyphens. Other examples of compound words are baseball, windfall, and keyboard.
Air is not a compound because it lacks a fixed formula and can separate into its components like oxygen and nitrogen, showing variability in properties across different locations and times.