What is the 3 characteristics of air?

Air is a mixture of gases, primarily consisting of nitrogen (about 78%), oxygen (about 21%), and trace amounts of other gases, including carbon dioxide and argon. It is invisible and colorless, making it difficult to see, but it has mass and can exert pressure. Additionally, air is essential for life on Earth, as it provides the oxygen needed for respiration and plays a crucial role in weather and climate systems.