Multiple choice

What is particulate matter?

  1. a mixture of solid and liquid particles in the air

  2. specific forms of matter

  3. an odorless gas

  4. only water suspended in the air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Particulate matter (PM) refers to a complex mixture of extremely small particles and liquid droplets suspended in the air, including dust, dirt, soot, and smoke.

Keep practicing — related questions