Forensic: Fibers vs. Hair

Hair is composed mostly of the protein

• lignin
• collagen
• keratin
• cellulose

The center-most part of a strand of hair is known as 

• the cortex
• the medulla
• the cuticle
• the lead

The middle layer of a hair (compared to the wood of a pencil) is the __

• medulla
• cortex
• cuticle
• keratin

The outside layer of a hair (compared to the ink on a pencil) is the ___

• medulla
• cortex
• cuticle
• keratin

The period of active hair growth is called the _____ stage.

• catagen

• telogen

• anagen

• imagen

Natural fibers can be harvested from

• plants and animals only
• plants, animals and minerals only
• animals only
• plants only

All of the following are characteristics of a synthetic fiber EXCEPT

• The are petroleum products.
• They are manufactured.
• They are produced by plants, animals and other organisms.
• They are used for the production of carpet fibers.

The name for man-made fibers is:

• processed fibers
• synthetic fibers
• natural fibers
• modified fibers

Tags

NGSS.MS-PS1-3

Type of evidence that can be traced back to many people

• testimonial
• class
• logical
• individual

What are the 2 types of Fibers?

• Yarn and textiles
• natural and synthetic 
• sheep and wool
• carpet and clothing