Chapter 12 Test: Hair & Fibers

What is the final growth phase, in which hair naturally falls out of the skin?

• telogen phase
• catagen phase
• follicular phase
• anagen phase

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Objective 12.1

Hair grows at the approximate monthly rate of:

• two centimeters
• 1.5 inches
• one centimeter
• one inch

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Objective 12.1

What is the first and most important step in the examination of fibers?

• synthesizing long-chained molecules into a polymer
• analyzing the individual characteristics of the material
• a microscopic comparison of color and diameter using a comparison microscope
• determination of whether the fiber is natural or man-made

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Objective 12.2

The _______ is important for the individualization of hair.

• cuticle
• follicular tag
• medulla
• cortex

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Objective 12.2

A cast of a hair surface can be made using:

• an scanning electron microscope (SEM).

• clear nail polish.

• softened vinyl.

• both clear nail polish and softened vinyl

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Objective 12.3

The most prevalent plant fiber is:

• wool
• mohair
• cotton
• hemp

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Objective 12.4

Which of the following is NOT a manufactured fiber grouping?

• mohair
• rayon
• polyester
• spandex

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Objective 12.4

Which of the following properties of fibers is most crucial for forensic comparisons?

• Length and texture
• Chemical composition
• Elasticity and strength
• Color and diameter

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Objective 12.5

In forensic fiber analysis, why is the examination of the refractive index of fibers important?

• It helps identify the fiber's color.
• It determines the fiber's texture.
• It can distinguish between different fiber types.
• It measures the fiber's length.

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Objective 12.5

Why is it essential to use clean and sterile tools when collecting fiber evidence?

• To prevent contamination of the evidence.
• To make the evidence easier to handle.
• To increase the quantity of collected fibers.
• To save time during evidence collection.

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Objective 12.6