Forensics: Fibers & Fingerprints

A ​ (a)   is a small, repeating molecule that can link to form a ​ (b)   .

• monomer
• polymer

The smallest indivisible unit of a textile, that is at least 100x longer than it is wide:

• textile

• fiber

• monomer

• yarn

A flexible, flat material made of interlacing yarns or threads:

• fiber

• textile

• yarn

• weft

Fibers that have been spun together are called...

• yarn/thread

• fiber

• polymer

• weft

In a weave, a ​ (a)   is a lengthwise (⋮) yarn, and a ​ (b)   is a crosswise (⋯) yarn.

• warp
• weft

A fiber produced naturally and harvested from animal, plant, or mineral sources is called a...

• natural fiber

• synthetic fiber

A fiber produced from a manufactured substance such as plastic is called a...

• natural fiber

• synthetic fiber

Tags

NGSS.MS-PS1-3

Match the fibers to their characteristics.

Groups:

(a) amorphous

,

(b) crystalline

• no defined shape

• stiff and strong

• loosely arranged

• ex. flax

• soft, absorbent

• ex. cotton

• tightly packed

• geometric shape

A passing of evidence from victim to suspect, or vice versa, is called...

• direct transfer

• secondary transfer

• synthetic transfer

• natural transfer

A passing of evidence from a source, to a suspect, and then to a victim, is an example of...

• direct transfer

• secondary transfer

• synthetic transfer

• natural transfer