Homonym: atmosphere (Mood)
The atmosphere is a layer of gases that surrounds a planet, held in place by gravity. On Earth, it is composed mainly of nitrogen (about 78%) and oxygen (about 21%), with trace amounts of other gases like carbon dioxide and argon. This layer is essential for life, as it provides the air we breathe and protects us from harmful solar radiation.
The atmosphere also plays a crucial role in weather and climate. It helps regulate temperature by trapping heat from the sun, creating a greenhouse effect. Different layers of the atmosphere, such as the troposphere and stratosphere, have distinct characteristics and functions, influencing everything from weather patterns to air travel.