Small solid particles or liquid droplets suspended in air are referred to as?

Particulate matter refers specifically to tiny solid particles or liquid droplets that are suspended in the air. This term encompasses a wide range of substances, including dust, pollen, soot, and liquid droplets from various sources such as vehicle emissions and industrial processes.

Particulate matter is significant because it can adversely affect air quality and human health, as these small particles can be inhaled into the lungs and may even enter the bloodstream. Their size and composition can vary widely, which allows for a comprehensive understanding of air pollution and its sources.

Other terms such as airborne contaminants or micro pollutants, while they may describe substances affecting air quality, are not as precise as "particulate matter" in defining the small solid or liquid forms suspended in the atmosphere. Stable sediments refer to materials that have settled and are not airborne, making it an inappropriate choice in this context. Thus, "particulate matter" is the most accurate description of the phenomena in question.