Particle formation refers to the process by which small particles, such as atoms or molecules, come together to create larger structures. This can occur through various mechanisms, including condensation, aggregation, or nucleation. In many cases, these particles can be found in gases, liquids, or solids, and their formation is essential in fields like chemistry and physics. In the context of aerosols, particle formation plays a crucial role in atmospheric science. For example, tiny droplets can form from water vapor in the air, influencing weather patterns and climate. Understanding particle formation helps scientists predict environmental changes and develop strategies for pollution control.