Forensics Fibers and Textiles

Amorphous means

• without plausible cause
• without a defined shape
• fibers that are spun tightly together
• collection of indivisible fibers

The most common type of regenerated fiber, derived from cellulose is

• cotton
• rayon
• silk
• nylon

Fibers that have spun together are called

• a textile
• yarn
• a mineral fiber
• a fiber

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

• polymer
• fiber
• monomer
• none of these choices

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

• necessary transfer
• direct transfer
• absolute transfer
• secondary transfer

The transfer of evidence such as a fiber from a source to a person, then to another person or object, 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 fallen or lost
• 85% of all fibers fallen or lost
• 95% of all fibers fallen or lost
• None of the above

Fiber evidence is gathered with 

• vacuums
• tape or lint roller
• forceps
• all choices correct

Two methods that can analyze fibers without damaging them are:

• polarizing light microscopy and infrared spectroscopy
• polarizing light spectroscopy and infrared microscopy
• heat and light
• none of these choices

A lengthwise yarn or thread in a weave

• polymer
• warp
• weft
• yarn