Question

1. two samples of soil have been collected from different areas of the crime scene. one is much darker than the other. what is the most logical explanation for this difference?

the darker sample was planted by a suspect to distract.
the darker sample is older than the lighter sample.
the darker sample is wetter than the lighter sample.
the darker sample is hotter than the lighter sample.

Explanation:

Soil color can be affected by moisture. Wet soil appears darker than dry soil due to the way light is absorbed and reflected. There is no inherent relationship between soil color and age (soil color can change over time in complex ways not just based on age alone). Planting by a suspect is a less likely default assumption without evidence. Temperature does not typically cause such a color difference in soil samples in this context.

Answer:

The darker sample is wetter than the lighter sample.