The composition of the atmosphere is primarily made up of nitrogen (78%), oxygen (21%), and trace amounts of other gases such as argon, carbon dioxide, and neon. This mixture of gases plays crucial roles in supporting life on Earth, such as oxygen for respiration and carbon dioxide for photosynthesis. The atmosphere also contains water vapor and aerosol particles, which affect weather patterns and climate. Understanding atmospheric composition is essential for studying meteorology and addressing environmental issues like climate change.