Atmosphere
The atmosphere is a vital layer of gases that envelops the Earth, extending nearly 700 km above the surface. It is primarily composed of nitrogen (78%) and oxygen (21%), with traces of argon and carbon dioxide, which play essential roles in supporting life. The atmosphere is divided into five distinct layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has unique characteristics; for instance, the troposphere is where weather phenomena occur, while the stratosphere contains the protective ozone layer that absorbs harmful ultraviolet rays. The atmosphere also regulates the Earth's temperature and supports the hydrological cycle, making it crucial for sustaining life. Understanding the atmosphere helps us appreciate its significance and the importance of protecting it from pollution and climate change, ensuring a healthier environment for future generations.
