What is the main difference between "sniffing" and "grabbing" when measuring radon samples?

The primary distinction between "sniffing" and "grabbing" in radon measurement is that "sniffing" involves immediate measurement of radon levels in the air. This method allows for a quick assessment of radon concentration at a specific moment in time, making it useful for identifying immediate hazards or sources of radon. Sniffing typically utilizes portable measuring devices that provide real-time readings, allowing technicians to promptly respond to radon levels.

In contrast, "grabbing" would involve collecting a sample of air or another medium for later analysis, which may use time-integrated methods to provide an average radon concentration over a specified period. This approach can yield more refined and reliable data regarding the radon levels in a given environment but does not offer the instant feedback that "sniffing" does.

Choosing the option that highlights the immediate measurement allows for a clear understanding of the real-time aspect of sniffing and its application in assessing radon exposure risks.