Fibers

A forensic scientist will ask questions about:

• type of fiber.

• number of fibers found.

• textile from which fiber originated.

• fiber color.

• where the fiber was found.

Natural fibers come from:

• animals.

• plants.

• minerals that are mined from the ground.

• All of these choices.

The name for man-made fibers is:

• processed fibers

• synthetic fibers

• natural fibers

• modified fibers

Tags

NGSS.MS-PS1-3

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

• 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

Fiber evidence is gathered with:

• vacuums.

• tape.

• glue.

• forceps.

• lint roller.

Natural plant fibers are produced from:

• seeds.

• fruits.

• stems and leaves.

• All of these choices.

All plant fibers share the common polymer that is:

• cellulose.

• protein.

• sulfuric acid.

• None of these choices.

A fiber is collected at a crime scene. When viewed under a compound microscope, what two traits would indicate that the fiber was a human hair and not a piece of fiber obtained from an article of clothing? (Choose 2)

• the presence of a cuticle

• a medullary index of 0.33 or less

• a wide diameter

• its ability to dissolve in water

Which of the following statements is not true about fiber evidence?

• To determine what it is you can burn it

• Looking under a microscope you can tell natural from synthetic

• Different weave patterns exist because different fabric has different purposes

• Fibers are considered individual evidence