Forensic Chapter 4 Test Review

True or False: The most common type of regenerated fiber, which is derived from cellulose and is mostly plant in origin, is rayon.

• True
• False

True or False: Synthetic polymer fibers, which all originate with petroleum products, are cellulose-based fibers.

• True
• False

Tags

NGSS.MS-PS1-3

True or False: Polyester has properties similar to nylon except it is easily broken down by light and concentrated acid.

• True
• False

True or False: A disadvantage of manufactured fibers is that they can deteriorate in bright sunlight and melt at a lower temperature than natural fibers.

• True
• False

Tags

NGSS.MS-PS1-4

True or False: Fibers are woven into textiles or fabrics.

• True
• False

Fibers that have been spun together are called:

• textile
• mineral fiber
• yarn
• fiber

A small molecule that may bond to other monomers to become a polymer is a:

• monomer
• fiber
• polymer
• None of the above

Tags

NGSS.MS-PS1-1

When fibers are transferred directly from victim to suspect or suspect to victim, this is called:

• necessary transfer
• direct transfer
• absolute transfer
• None of the above

The transfer of evidence such as a fiber from a source to a person, then to another person, is called:

• primary transfer
• secondary transfer
• tertiary transfer
• direct transfer

Early collection of fibers in an investigation is critical. Within 24 hours, an estimated:

• 75% of all fibers may have fallen from a victim or been lost from a crime scene.
• 85% of all fibers may have fallen from a victim or been lost from a crime scene.
• 95% of all fibers may have fallen from a victim or been lost from a crime scene.
• None of these choices.