Air

Air is a mixture of gases surrounding Earth, primarily composed of nitrogen (about 78%), oxygen (around 21%), and small amounts of other gases like argon and carbon dioxide. It forms Earth's atmosphere, providing essential oxygen for living beings and aiding in weather processes. Air has mass, exerts pressure, and can vary in temperature, humidity, and composition depending on location and conditions. It’s invisible but vital for life, enabling breathing, supporting combustion, and helping regulate climate and temperature on our planet.