SCICR Forensic Science - GradeBook

Which of the following is NOT a method used to collect trace evidence?

• Bathing

• Scraping

• Vacuum sweeping

• combing

Class evidence means that items are grouped with a class of like items. True False

• True

• False

When hair is being examined, what feature is NOT important?

• Length

• Style

• Presence of medulla

• Intensity of color pigment

Caucasian head hairs are usually straight or wavy, with very fine to coarse pigments that have a more even distribution.

• True

• False

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Examiners can tell the following about hair?

• If it was pulled out.

• If it came from a live or dead person.

• If it had been bleached.

• All of the above.

The three layers of hair are cuticle, cortex, and convex.

• True

• False

The hard outside covering that protects the inner layer of hair. The overlapping scale point to the tip. The scales are cells that have hardened and flattened. This defines the

• Cuticle

• Cortex

• Medulla

The medulla is made of cells that run through the center of the cortex like a canal. The medulla index in humans is 1/3. Sometimes the medulla may not be a continuous canal.

• Cuticle

• Cortex

• Medulla

Tags

NGSS.MS-LS1-3

The cortex is made of cells within the cuticle. Human hair contains 75-90% cortex. This is where pigment is found that gives hair its color.

• True

• False

• sometimes

Tags

NGSS.MS-LS1-2

The following kind of evidence needs to be collected before animal hair can be examined.

• A number of hairs need to be collected because they can vary in color and length.

• The hair needs to be collected from each area.

• The sample should contain full-length hairs and combings as well as pluckings.

• All of the above.