Thousands of different solid or liquid particles suspended in air are collectively known as

Thousands of different solid or liquid particles suspended in air are collectively known as

• A. Gases
• B. Particulate Material
• C. Aerosols
• D. Vapors

Answer: (B)

Particulate material refers to the general category of solid or liquid particles that are suspended in air. These tiny particles—dust, soot, pollen, droplets, smoke—make up what we measure as particulate matter (PM) and can vary in composition and size. Gases are individual molecules that fill space, not discrete particles suspended in air, and vapors are the gaseous forms of substances that are typically liquids or solids at room temperature. Aerosols describe the suspension itself in a gas, but the broad term for the dispersed particles is particulate material, which is why it’s the best answer here.

Particulate material refers to the general category of solid or liquid particles that are suspended in air. These tiny particles—dust, soot, pollen, droplets, smoke—make up what we measure as particulate matter (PM) and can vary in composition and size. Gases are individual molecules that fill space, not discrete particles suspended in air, and vapors are the gaseous forms of substances that are typically liquids or solids at room temperature. Aerosols describe the suspension itself in a gas, but the broad term for the dispersed particles is particulate material, which is why it’s the best answer here.