Hair and Fiber Evidence Review Game

Human hair, animal hair, and fiber evidence are what type of evidence?

• All class evidence

• All individual evidence

• Some are class, some are individual

Which of these statements BEST describes the Locard Principle?

• Every contact leaves a trace.

• Every piece of evidence is important, no matter how small.

• It is a principle of relativity.

• It is a rule of thermodynamics.

What is hair made of?

• The protein Keratin

• Calcium

• Cellulose

• Collagen

Which of these cross section shapes makes wavy hair?

• The slight oval (in the middle).

• The perfect circle (on the left).

• The flat oval (on the right).

• The triangle shape.

Describe the appearance of hair that is round (far left) and flat oval (far right)

• Round will be straight hair, very flat will be very curly.

• Round will be curly hair, very flat will be straight.

• Round will be wavy hair, very flat will be frizzy.

• Round will be thick hair, very flat will be thin.

Draw the appearance of: Human hair with a CONTINUOUS medulla, Human hair with a TRACE medulla, Human hair with an ABSENT medulla. Refer to the diagram for Continuous, Fragmented, Trace, and Absent medulla.

• Continuous: a solid line through the center; Trace: a few small segments; Absent: no medulla visible.

• Continuous: no medulla visible; Trace: a solid line through the center; Absent: a few small segments.

• Continuous: a few small segments; Trace: no medulla visible; Absent: a solid line through the center.

• Continuous: a dotted line through the center; Trace: a thick band; Absent: a broken line.

DNA can be taken from hair evidence. True or false?

• Always True; no matter how small the hair sample

• False

• True; only when cells are attached at the root

• True: Only from hair with no root

What kind of microscope do CSI use to examine hairs and fibers?

• Comparison Microscope

• Electron Microscope

• Confocal Microscope

• Scanning Tunneling Microscope

Silk is made by which of the following processes?

• Silkworms spin fibers to form cocoons, which are then unwound to obtain silk threads.

• Cotton plants are harvested and spun into threads.

• Wool is sheared from sheep and spun into yarn.

• Synthetic fibers are produced from chemicals in factories.

When analyzing/comparing fiber samples, where does the 'known sample' come from?

• Known samples come from the suspected source of the fibers that were found at the crime scene - for example: fibers taken from the suspect’s sweater.

• Known samples are always collected from the crime scene itself, regardless of the suspect.

• Known samples are obtained from random locations unrelated to the investigation.

• Known samples are created synthetically in the laboratory for comparison purposes.