Fiber Analysis Lab Quiz

Natural fibers can be harvested from

• plants and animals

• only from plants

• only from animals

• plants, animals, and minerals

All of the following are characteristics of a synthetic fiber except

• They are formed by combining monomer compounds into polymer molecules.

• They are man-made.

• They are used in the production of carpet fibers.

• They do not contain any natural fibers.

Tags

NGSS.MS-PS1-3

A characteristic of natural fibers is that they

• are stronger than synthetic fibers

• melt at a lower temperature than synthetic fibers

• are affected by microscopic organisms

• will not break down when exposed to bright light

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 riber burns

• all of the above

Fibers are an excellent source of trace evidence because

• They are easily transferred from victim to suspect.

• They are often overlooked by a suspect.

• They can be easily collected and stored.

• All of the above.

What is Loccard's Exchange Principle?

• Perpetrators always leave evidence behind.

• Every contact leaves a trace.

• All touches leave evidence.

• Long, violent confrontations leave evidence.

Fiber does NOT fall into what type of evidence?

• Individual

• Class

• Trace

• Circumstantial

Which of the following is not a synthetic fiber?

• Rayon
• Polyester
• Acrylic
• All of the above are synthetic.

Tags

NGSS.MS-PS1-3

Which of the following is made of natural polymers?

• Plastic
• Nylon
• Starch
• Paint

In a burn test, these fibers will often shrink back away from the flame.

• Synthetic
• Natural

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4