Chapter 4 Test Study of Fibers and Fabrics - Joseph Morsaw | Library

2

Fibers are used in forensic science to create a link between crime and ____________________.

2

Very small fibers are classified as __________ evidence.

8

color of hair
Point of origin
length of fibers
color
manufacturing machine
Location of suspects
Possibility of violence
Type of fiber

Fiber evaluation can show
Fiber evaluation cannot show

2

Which of these is an example of circumstantial evidence?

2

Why is it important to find multiple fibers?

2

_______________ transfer– victim to suspect or suspect to victim directly.

2

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

2

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

2

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

2

A disadvantage of synthetic fibers is that they can deteriorate in bright sunlight and melt at a lower temperature than natural fibers.

2

Fibers are woven into textiles or fabrics.

2

Fibers that have been spun together are called:

2

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

2

Fiber evidence is gathered with:

2

Two methods that can analyze fibers without damaging them are:

2

Fibers are classified as either:

2

Natural plant fibers are produced by:

2

All plant fibers share the common polymer that is:

2

Until the nineteenth century, only plant or animal fibers were used to make clothing and textiles. Half the fibers produced today are synthetic. They are categorized as:

2

The number of threads that are packed together for any given amount of fabric is known as _________________________________.

2

The most common form of fiber transfer to be encountered at a crime scene is _______________ of a textile.

2

At times, most fibers recovered from a victim are found in the victim's ____________________.

2

Natural fibers come from animals, plants, and ________________ that are mined from the ground.

2

Using the fiber burn analysis key, if a fiber does not smell like hair and it ceases to burn then it is _________________.

2

Mohair is hair from __________ (animal).

2

Celenese is cellulose chemically combined with ______________.

2

_____________________ has surface scales, hollow or partial hollow core and fibers up to 3 inches long.

2

What type of weave pattern is pictured?

2

What type of weave pattern is pictured?

10

Essay: Write the answer to one essay question in the space provided below.

FCA’s 1. Write in complete sentences and paragraph form.
2. Use Chapter 4 terminology to answer questions(example: fabric, twill, etc...).
3. Provide inferences, other thoughts, or personal experiences in your answer whenever possible.

A) A fiber is found on the victim, explain why this evidence alone is not enough to convict a suspect.

B) Choose a weave pattern, explain how the pattern is created and strengths/weaknesses of the weave.