Final answer:
Gunshot residue (GSR) and shotgun pellets are associated with firearms, but they are different in nature and serve different purposes in forensic investigations.
Step-by-step explanation:
The subject of this question is Forensic Science.
Gunshot residue (GSR) is the term used to describe the particles that are released when a firearm is discharged. These particles can include a variety of components, such as burnt and unburnt powder, primer residue, and lead from the bullet. GSR can be useful in forensic investigations to determine if someone has recently fired a gun.
Shotgun pellets, on the other hand, are the actual projectiles that are fired from a shotgun. They are small metal or plastic spheres that spread out upon leaving the barrel. While both GSR and shotgun pellets are associated with firearms, they are different in nature and serve different purposes in forensic investigations.