Question

check your understanding
what is the difference between a microscopic property and a macroscopic property?

what microscopic properties of hair can be useful to an investigator?

what are the two parts of the hair?

what are the 3 parts of the hair shaft?

Explanation:

1. What is the difference between a microscopic property and a macroscopic property?

Microscopic properties relate to the structure, composition, or behavior of individual particles (e.g., atoms, molecules, or small components like hair cells) and are observed using microscopes. Macroscopic properties are characteristics of a substance or object as a whole, visible to the naked eye (e.g., hair color, length, texture).

Microscopic hair properties like the pattern of the cuticle (scales on the hair surface), the structure of the cortex (internal protein arrangement), the presence/absence of a medulla (central core) and its pattern, hair diameter, and any abnormalities or damage can help investigators. These can be used to match hair samples, determine species, or get clues about the source (e.g., human vs. animal, or even specific individuals in some cases).

The two main parts of the hair are the hair shaft (the part that extends above the skin's surface) and the hair root (the part that is below the skin's surface, embedded in the hair follicle).

Answer:

Microscopic properties: Observed at the particle/ small - scale level (e.g., hair's cellular structure, internal components), require magnification. Macroscopic properties: Observed at the bulk/ large - scale level (e.g., hair length, color, texture), visible to the naked eye.

2. What microscopic properties of hair can be useful to an investigator?