Which statement about aerosols, droplets, and spatter is true?

• A. Spatter: Visible particles larger than droplets
• B. Aerosols: <50 µm
• C. Droplets: >50 µm
• D. Aerosols: >50 µm

Answer: (A)

The main idea here is how particle size and visibility separate aerosols, droplets, and spatter. Spatter refers to the largest, visible particles produced during procedures. Because they are big enough to be seen with the naked eye, they stand out from smaller particles. This makes the statement that spatter are visible particles larger than droplets a straightforward, practical descriptor: spatter are the largest category, so you can see them and they exceed the size of the typical droplets.

In contrast, aerosols are the tiniest particles (generally considered under 50 micrometers) that can stay suspended in the air, and droplets are larger particles than aerosols that tend to settle more quickly after traveling a short distance. The option stating aerosols are greater than 50 micrometers isn’t correct, since aerosols are defined as smaller than that. While the size distinctions for aerosols and droplets are accurate, the statement about spatter emphasizes the visibility and relative size in a way that aligns with how these terms are used in practice, which is why it’s considered the best answer.