Final answer:
Physical evidence is classified into direct evidence and circumstantial evidence.
Step-by-step explanation:
Physical evidence is classified into two categories: direct evidence and circumstantial evidence. Direct evidence refers to evidence that directly proves a fact without needing any further inference, such as a video recording of a crime. Circumstantial evidence, on the other hand, is evidence that relies on inference and suggests a fact without directly proving it, such as fingerprints found at a crime scene.