Gases are one of the three main states of matter, alongside solids and liquids. They are made up of tiny particles that are far apart and move freely, which allows gases to fill any space they occupy. Common examples of gases include oxygen, carbon dioxide, and nitrogen. Unlike solids, gases do not have a fixed shape or volume, making them very flexible. In everyday life, we encounter gases in many ways. For instance, when we breathe, we take in oxygen from the air, which is essential for our survival. Additionally, gases play a crucial role in weather patterns, as water vapor in the atmosphere can lead to clouds and precipitation.