Fibers Review

Natural Fibers can be harvested from

• plants and animals

• only from plants

• only from animals

• plants, animals, and minerals

What characteristics of cotton make it a great source of fiber for clothing?

• it is very easy to grow

• It is resistant to staining.

• The fibers are easily woven and dyed.

• The fibers are extremely long

The shiny nature of silk can be related to

• its hollow core

• its ability to refract light

• its smooth, round fibers

• mucus secretions from the silkworm

Tags

NGSS.MS-PS4-2

Mineral fibers such as asbestos are very durable. These fibers are used in all of the following EXCEPT:

• rope

• shingles

• floor tiles

• brake liners

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 natural fibers.

Tags

NGSS.MS-PS1-3

A characteristic of natural fibers is that they

• are stronger than synthetic fibers

• will not break down when exposed to bright light

• melt at a lower temperature than synthetic fibers

• are affected by microscopic organisms.

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 fibers burn

• all of the above

Tags

NGSS.MS-PS1-2

Fibers are an excellent source of trace evidence because they

• 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

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 .33 or less

• a wide diameter

• its ability to dissolve in water

Which of the following represents Leno

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