Question

according to locards exchange principle, what happens when two objects come in contact?
they change color
a cross - transfer of physical evidence can occur
they lose their original properties
they become identical

Explanation:

Locard's Exchange Principle states that when two objects come into contact, there is a cross - transfer of physical evidence. This is a fundamental concept in forensic science. For example, when a criminal comes into contact with a crime scene (like touching a surface), fibers from their clothing might be left at the scene (transfer from criminal to scene) and at the same time, particles from the scene (like dust) might be transferred to the criminal's clothing (transfer from scene to criminal). The principle is not about color change (which is not a general result of contact in the context of this principle), losing original properties (in a general sense as per the principle's focus on evidence transfer), or becoming identical (which is an extreme and incorrect interpretation).

Answer:

A cross - transfer of physical evidence can occur