Ch. 4 Fibers and Textiles Test

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

• True

• False

Synthetic polymer fibers, which all originate with petroleum products, are cellulose-based fibers.

• True

• False

Tags

NGSS.MS-PS1-3

Polyester has properties similar to nylon except that it is easily broken down by light and concentrated acid.

• True

• 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-PS1-3

Fibers are woven into textiles or fabrics.

• True

• False

Fibers that have been 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:

• monomer

• polymer

• fiber

• none of these choices

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

• necessary transfer

• direct transfer

• absolute transfer

• none of these choices

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

• primary transfer

• tertiary transfer

• secondary 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