Fiber Forensics

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

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

• textile

• fiber

• monomer

• yarn

Which of the following techniques can be used forensically analyze a fiber involved in a crime?

• chemical analysis

• microscopic analysis

• absorbency

• burn test

• dusting

Which of the following observations are used to help identify a specific fiber?

• smell of the burned fiber

• on contact with the flame, does the fiber coil or melt?

• color and structure of the residue left after the fiber burn

• all of the above

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

• direct transfer

• absolute transfer

• source transfer

• secondary transfer

If you find a strand of fiber at a crime scene, what could it help you determine?

• The time of the crime

• The type of clothing the criminal wore

• The criminal’s eye color

• The weather on the day of the crime

Tags

NGSS.MS-PS1-3

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

• necessary transfer

• direct transfer

• absolute transfer

• secondary transfer

Which of the following would be the best way to determine type of fiber if there is a small amount of fiber found at the crime scene?

• burn test

• polarizing microscope

• acid test

• absorbency test

What kind of fiber is being tested in a burn test if the fiber melts when nears flame, smells of chemical burn or plastic burning, self-extinguishes, and leaves behind hard black ball.

• cotton

• hemp

• polyester

• wool

Tags

NGSS.MS-PS1-4