
Forensic Fiber Analysis
Authored by Lisa Thompson
Science
12th Grade
NGSS covered

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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fibers are commonly examined by a microscope that changes typical scattered light wavelengths into wavelengths that vibrate in only one direction, which enhances contrast. This process describes which microscopy analysis?
A Polarizing Microscopy
B Comparison Microscopy
C Oblique Lighting Microscopy
D Transmission Electron Microscopy
Tags
NGSS.HS-PS4-3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When examining a fiber using a polarizing microscope, the characteristic that would distinguish a textile fiber from an animal hair is —
presence of cuticle scales
a crystalline structure
melanin in cortex
a uniform diameter
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the hairs were an exact match when compared under a microscope, is that enough to place the suspect in jail? Why or why not?
Yes, because a microscopic match is conclusive evidence.
No, does not contain the root, no DNA, so this is class evidence
Yes, because it proves the suspect was at the crime scene.
No, because hair evidence is not admissible in court.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which two characteristics of a hair help determine if the hair came from a human or animal?
Medulla pattern and cuticle type
Color and length
Thickness and texture
Curliness and elasticity
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
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 fiber burn
all of the above
Tags
NGSS.MS-PS1-2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The transfer of evidence such as a fiber from a source to a person, then to another person, is called:
direct transfer
absolute transfer
source transfer
secondary transfer
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When fibers are transferred straight from victim to suspect or suspect to victim, this is called:
necessary transfer
direct transfer
absolute transfer
secondary transfer
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