FRS

Forensic Science Midterm Review

Forensic Fiber Analysis Assessment

1. What percentage of fiber evidence is typically lost from a crime scene within 24 hours?
a. 85%
b. 90%
c. 95%
d. 99%

2. Which of the following is NOT a source of animal fibers?
a. Fur
b. Hair
c. Silk webbing
d. Cellulose

3. What type of microscopy allows scientists to examine optical properties using specific wavelengths of light?
a. Electron microscopy
b. Polarizing light microscopy
c. Compound microscopy
d. Phase contrast microscopy

4. Which fiber type is known for being extremely elastic?
a. Polyester
b. Nylon
c. Acrylic
d. Spandex

5. What is the term for threads that run lengthwise in woven textiles?
a. Weft
b. Weave
c. Warp
d. Thread count

6. Which type of transfer occurs when fibers are picked up from the environment and then transferred to another person?
a. Primary transfer
b. Secondary transfer
c. Direct transfer
d. Tertiary transfer

7. What material is silk derived from?
a. Plant stems
b. Coconut husks
c. Silkworm cocoons
d. Sheep wool

8. Which synthetic fiber is described as the most durable man-made fabric?

a. Nylon
b. Polyester
c. Acrylic
d. Rayon

9. What is the primary component of all plant fibers?
a. Protein
b. Cellulose
c. Polymer
d. Keratin

10. Which collection method is most appropriate for gathering fibers from large areas?
a. Forceps
b. Sticky tape
c. Vacuum
d. Visual search

11. What characteristic do synthetic fibers have under magnification?
a. Irregular shapes
b. Variable diameters
c. Regular diameters
d. Cuticle layers

12. Which fiber type was first introduced as artificial silk for pantyhose?
a. Rayon
b. Nylon
c. Polyester
d. Acrylic

13. What is the most common regenerated fiber?
a. Acetate
b. Rayon
c. Nylon
d. Polyester

14. When is fiber evidence most valuable in forensic investigation?
a. After several weeks
b. Within 24 hours
c. After one week
d. After one month

15. Which mineral fiber is known to cause cancer?
a. Fiberglass
b. Asbestos
c. Silicon
d. Granite

16. What type of evidence are textiles considered due to mass production?
a. Individual evidence

b. Class evidence
c. Trace evidence
d. Primary evidence

17. Which destructive test compares melting points and ash formation?
a. Chromatography
b. Burning
c. Solvent testing
d. Staining

18. What is the thread count range typically found in luxury sheets?
a. 200-300
b. 300-500
c. 500-800
d. 800-1200

19. What are the building blocks of synthetic polymers called?
a. Proteins
b. Cellulose
c. Monomers
d. Filaments

20. Which fiber type is commonly used in doormats and baskets?
a. Hemp
b. Coir
c. Sisal
d. Jute

Trace Evidence and Forensic Analysis Assessment

1. According to Locard's principle, what is the fundamental concept of trace evidence?
a. Every contact leaves a trace
b. Evidence can only be collected within 24 hours
c. Only visible evidence is valuable
d. Trace evidence requires microscopic analysis

2. Which microscope type can magnify objects up to 300,000X?
a. Compound microscope
b. Phase contrast microscope
c. Scanning electron microscope
d. Polarizing microscope

3. What is the primary protein found in hair?
a. Collagen
b. Keratin
c. Elastin
d. Fibrin

4. Which part of the hair structure contains the pigment that determines hair color?
a. Medulla
b. Root

c. Cuticle
d. Cortex

5. For nuclear DNA testing of hair evidence, what must be present?
a. Medulla
b. Cortex
c. Root
d. Cuticle scales

6. What type of microscope is used to compare two pieces of evidence simultaneously?
a. Polarizing microscope
b. Comparison microscope
c. Fluorescent microscope
d. Phase contrast microscope

7. Which characteristic of hair is MOST important in distinguishing between different individuals?
a. Medulla pattern
b. Cuticle pattern
c. Cortex distribution
d. Root shape

8. What process is used to separate mixtures into their different components?
a. Microscopy
b. Chromatography
c. Spectroscopy
d. Polarization

9. After birth, humans:
a. Develop new hair follicles monthly
b. Generate follicles during puberty
c. Create follicles seasonally
d. Produce no new follicles

10. Which type of evidence would be most useful in determining a person's drug use history?
a. Fingernail samples
b. Hair samples
c. Skin cells
d. Blood samples

11. In fiber analysis, what are the two main categories of fibers?
a. Animal and plant
b. Natural and synthetic
c. Organic and inorganic
d. Woven and unwoven

12. What characteristic is NOT typically examined in fiber evidence analysis?
a. DNA composition
b. Dye composition
c. Fiber length
d. Spinning method

13. Which type of evidence can provide information about a vehicle's make and model?
a. Glass fragments
b. Paint chips
c. Tire tracks
d. Blood spatter

14. For gunshot residue testing, within what timeframe must samples be collected?
a. 12 hours
b. 24 hours
c. 6 hours
d. 48 hours

15. Which trace evidence can reveal where a person lives, works, and if they have pets?
a. Paint chips
b. Glass fragments
c. Dust and dirt
d. Explosives residue

16. What is required for a physical match analysis?
a. Chemical composition
b. Unique matching edges
c. Similar coloration
d. Identical weight

17. In document examination, what creates unique characteristics?
a. Paper type only
b. Ink composition only
c. Handwriting style
d. Paper size

18. Which layer of hair is composed of overlapping scales?
a. Medulla
b. Cortex
c. Cuticle
d. Matrix

19. What type of DNA can be tested from hair shaft without a root?
a. Nuclear DNA
b. Mitochondrial DNA
c. Bacterial DNA
d. Y-chromosome DNA

20. Which fiber is most commonly used in textile materials?
a. Wool
b. Cotton
c. Silk
d. Nylon

Hair Analysis in Forensic Science Assessment

1. What is the primary reason hair is not considered the best type of physical evidence for establishing identity?
a. It decomposes too quickly
b. It cannot definitively prove two hairs came from the same source
c. It is rarely found at crime scenes
d. It is too difficult to collect properly

2. Approximately how many hairs does the average human shed daily?
a. 100
b. 150
c. 250
d. 500

3. When collecting hair evidence, which container should NOT be used?
a. Paper bindles
b. Plastic bags
c. Coin envelopes
d. Large paper envelopes

4. What is the primary function of hair in mammals?
a. Sensory perception
b. Temperature regulation
c. Friction reduction
d. Camouflage

5. Which layer of the hair shaft contains pigment granules?
a. Medulla
b. Cortex
c. Cuticle
d. Follicle

6. How many hair follicles does a human typically have at birth?
a. 2 million
b. 3 million
c. 4 million
d. 5 million

7. Which racial group commonly exhibits a continuous medulla pattern?
a. Europeans
b. Africans
c. Native Americans
d. Middle Easterners

8. What is the recommended number of head hairs to collect from a suspect?
a. 25
b. 50
c. 75
d. 100

9. During which stage of the hair growth cycle is the hair easily lost?
a. Anagen
b. Catagen

c. Telogen
d. Mitogen

10. What is the approximate growth rate of human hair per month?
a. 0.5 cm
b. 1.3 cm
c. 2.0 cm
d. 2.5 cm

11. If a hair's medullary index is 0.6, the hair is most likely from:
a. A human
b. An animal
c. Cannot be determined
d. A synthetic fiber

12. Which microscope type can detect the presence of hair dye?
a. Electron microscope
b. Comparison microscope
c. Fluorescence microscope
d. Light microscope

13. What protein is hair primarily composed of?
a. Collagen
b. Elastin
c. Keratin
d. Fibrin

14. How long does the anagen (growth) phase typically last?
a. 100 days
b. 500 days
c. 1000 days
d. 1500 days

15. What percentage of hair follicles are located on the head at birth?
a. 2%
b. 5%
c. 10%
d. 15%

16. Which hair color typically has the fewest number of hairs?
a. Black
b. Blonde
c. Brown
d. Red

17. What type of evidence is hair classified as?
a. Individual evidence
b. Class evidence
c. Trace evidence

d. Direct evidence

18. What happens to hair approximately 2-3 weeks after cutting?
a. It becomes brittle
b. It develops split ends
c. The tips become rounded
d. The color changes

19. Which test can identify up to 14 different elements in a single strand of hair?
a. Mass spectrometry
b. Neutron Activation Analysis
c. Chromatography
d. Spectrophotometry

20. What characteristic of forcibly removed hair distinguishes it from naturally shed hair?
a. Length of the strand
b. Color of the root
c. Damage to the root area
d. Thickness of the shaft

Forensic Glass Analysis Assessment

1. What is the primary ingredient of glass?
a. Calcium oxide
b. Silicon dioxide (SiO2)
c. Lead oxide
d. Sodium compounds

2. Which type of glass is most commonly used for windowpanes and beverage containers?
a. Crystal glass
b. Pyrex
c. Fused quartz
d. Soda-lime glass

3. What causes glass to have a disordered state similar to a liquid?
a. Slow heating process
b. Regular crystalline structure
c. Rapid cooling process
d. Chemical additives

4. In crystal or leaded glass, what compound replaces calcium oxide?
a. Silicon dioxide
b. Sodium compounds
c. Nickel oxide
d. Lead oxide

5. Which property of glass can be determined using water displacement?
a. Volume
b. Density
c. Refractive index
d. Mass

6. What metal oxide creates a blue color in glass?
a. Nickel
b. Selenium
c. Cobalt
d. Lead

7. Which fractures form first when glass breaks?
a. Concentric
b. Radial
c. Wavy
d. Linear

8. How do high-speed impacts affect concentric fractures compared to low-speed impacts?
a. Create more fractures
b. Create deeper fractures
c. Create fewer fractures
d. Create no difference

9. When a bullet passes through glass, what shape is created?
a. Rectangular
b. Spherical
c. Oval
d. Cone

10. Which type of glass is specifically designed to withstand wide temperature ranges?
a. Crystal glass
b. Pyrex
c. Soda-lime glass
d. Fused quartz

11. What occurs on the side of glass opposite to the impact point?
a. Compression
b. Tension
c. Melting
d. Crystallization

12. How should small glass fragments be stored as evidence?
a. Plastic bags
b. Metal containers
c. Paper bindles
d. Glass containers

13. What shape bullet hole indicates the shooter was perpendicular to the glass?
a. Oval
b. Square
c. Round
d. Irregular

14. When glass breaks due to heat, which direction do the fractures point?

a. Away from heat
b. Randomly
c. Towards heat
d. Parallel to heat

15. What is the atomic arrangement pattern of glass called?
a. Crystalline
b. Amorphous
c. Symmetric
d. Linear

16. Which property measures how light bends as it passes through glass?
a. Density
b. Flexibility
c. Refractive index
d. Mass

17. What should be used to separate large pieces of glass evidence during shipment?
a. Paper
b. Plastic
c. Cotton
d. Metal

18. Why is it important to collect all glass at a crime scene?
a. To determine color
b. To measure density
c. Physical matches
d. Chemical analysis

19. What causes glass to sparkle in crystal or leaded glass?
a. Higher flexibility
b. Lower density
c. Higher density
d. Higher temperature resistance

20. What forms second in glass fracture patterns?
a. Radial fractures
b. Concentric fractures
c. Wave patterns
d. Impact points

Crime Scene Investigation Assessment

1. According to Locard's principle, what determines the extent of physical evidence transfer between objects?
a. Duration and nature only
b. Intensity, duration, and nature
c. Nature and intensity only
d. Time and pressure only

2. Which type of evidence involves first-hand observations?
a. Physical evidence
b. Circumstantial evidence
c. Direct evidence
d. Trace evidence

3. What is an example of class evidence?
a. DNA profile
b. Blood type
c. Fingerprints
d. Handwriting

4. What percentage of wrongful convictions overturned by DNA testing involved eyewitness misidentification?
a. 50%
b. 65%
c. 80%
d. 75%

5. Which search pattern involves moving from the outside to the center of a scene?
a. Linear pattern
b. Grid pattern
c. Spiral pattern
d. Quadrant pattern

6. What type of container should be used for bloodstained materials?
a. Airtight plastic containers
b. Paper containers
c. Metal containers
d. Glass containers

7. What must be included in an evidence log?
a. Only the date and time
b. Only the collector's signature
c. Description, names, date, time, and signatures
d. Only the evidence description

8. When can a warrantless search be conducted?
a. At any time
b. Only with a judge's verbal permission
c. Under emergency circumstances
d. Only during daylight hours

9. What is the primary purpose of control samples?
a. To contaminate evidence
b. For exclusion purposes
c. To create confusion
d. To test equipment

10. What is the first step in the Seven S's of Crime Scene Investigation?
a. Scan the scene
b. Secure the scene

c. See the scene
d. Sketch the scene

11. What should witnesses NOT be allowed to do at a crime scene?
a. Give statements
b. Talk to one another
c. Leave the area
d. Identify suspects

12. Which Amendment governs the removal of evidence from a crime scene?
a. First Amendment
b. Third Amendment
c. Fourth Amendment
d. Fifth Amendment

13. What type of evidence can narrow down to a single person or thing?
a. Class evidence
b. Trace evidence
c. Individual evidence
d. Physical evidence

14. What must be written across the evidence container's tape seal?
a. Case number
b. Date and time
c. Collector's signature
d. Evidence description

15. What is the purpose of the chain of custody?
a. To track evidence possession
b. To organize evidence
c. To analyze evidence
d. To dispose of evidence

16. How should North be indicated in a crime scene sketch?
a. With a compass
b. It's not necessary
c. With an arrow
d. With coordinates

17. What type of light may be used to help find trace evidence?
a. LED light
b. Black light
c. Fluorescent light
d. Natural light

18. What is crucial to establish about the victim through interviews?
a. Financial status
b. Criminal record
c. Profile

d. Medical history

19. What type of fold is used for most biological evidence?
a. Triangle fold
b. Square fold
c. Druggist's fold
d. Envelope fold

20. What should investigators initially treat all death investigations as?
a. Accidents
b. Suicides
c. Homicides
d. Natural causes

Forensic Science Ethics and Legal Responsibilities Assessment

1. What is the primary purpose of forensic science in the legal system?
a. To support only criminal investigations
b. To provide factual information about physical evidence regardless of which side it supports
c. To assist only in civil cases
d. To create legal regulations and rules

2. Which of the following best describes the ethical responsibility of a forensic scientist when reporting findings?
a. Report only findings that support the prosecution
b. Modify results to match attorney expectations
c. Enhance results through excessive testing
d. Report observations impartially regardless of personal beliefs

3. What is the "Chain of Custody" in forensic science?
a. A series of laboratory procedures
b. The hierarchy of forensic scientists
c. The chronological documentation of evidence handling
d. A method of court reporting

4. When examining evidence previously analyzed by another scientist, what is the proper ethical approach?
a. Immediately report differences to the court
b. Ignore the previous findings completely
c. Keep findings confidential from other scientists
d. Attempt to resolve conflicts with the other scientist before trial

5. What is NOT an ethical guideline for analyzing physical evidence?
a. Using accurate and reliable equipment
b. Making excessive tests to enhance results
c. Using accepted methodology in the field
d. Making adequate examination of evidence

6. How should forensic scientists handle testimony about areas outside their expertise?
a. Research the topic thoroughly before testifying
b. Defer to other experts in those areas
c. Make educated guesses based on experience

d. Avoid extending conclusions beyond personal expertise

7. Which statement best describes the relationship between science and law in forensic work?
a. Science and law are completely separate disciplines
b. Science deals with natural phenomena while law deals with human-made rules
c. Law always takes precedence over scientific findings
d. Scientific principles vary between civil and criminal cases

8. What is the proper approach to photographic evidence in forensic reports?
a. Use dramatic effects to emphasize important details
b. Present images that support only one side
c. Follow current accepted standards without sensationalism
d. Enhance photos to make evidence more visible

9. How should forensic scientists handle conflicts of opinion with colleagues?
a. Immediately report disagreements to supervisors
b. Ignore conflicting opinions
c. Respect opinions unless proven false or inaccurate
d. Always defer to more senior scientists

10. What is the primary ethical consideration regarding fees for forensic services?
a. Charge based on case outcome
b. Set reasonable fees for services
c. Provide services free of charge
d. Base fees on court decisions

Introduction to Forensic Science Assessment

1. Who is considered the "Father of Forensic Toxicology"?
a. Hans Gross
b. Mathieu Orfila
c. William Herschel
d. Edmond Locard

2. Which of these is NOT one of the four major crime labs discussed?
a. FBI
b. DEA
c. CIA
d. ATF

3. In what year was the first case using forensic science recorded?
a. 1814
b. 1737
c. 13th Century China
d. 1856

4. What does the chain of custody document?
a. Only the initial collection of evidence
b. Laboratory analysis procedures
c. The complete trail of evidence from seizure to disposition
d. Just the court proceedings

5. Which amendment protects against unreasonable search and seizure?

a. Fifth Amendment
b. Third Amendment
c. First Amendment
d. Fourth Amendment

6. What percentage of criminal cases end in negotiated pleas?
a. Less than 50%
b. Approximately 75%
c. More than 90%
d. About 85%

7. Who developed the first comparison microscope for bullet analysis?
a. Calvin Goddard
b. Leone Lattes
c. Albert S. Osborn
d. Karl Landsteiner

8. Which branch of forensic science deals with insects to determine time of death?
a. Forensic Anthropology
b. Forensic Serology
c. Forensic Entomology
d. Forensic Toxicology

9. Where is the FBI's headquarters located?
a. New York City
b. Washington, D.C.
c. Los Angeles
d. Chicago

10. What type of law deals with relationships between individuals involving matters such as property and contracts?
a. Administrative Law
b. Criminal Law
c. Common Law
d. Civil Law

11. Which unit in a crime laboratory processes and examines latent fingerprints?
a. Photography Unit
b. Physical Science Unit
c. Document Examination Unit
d. Fingerprint Unit

12. Who is credited with discovering the ABO blood groups?
a. Francis Galton
b. Hans Gross
c. Karl Landsteiner
d. Leone Lattes

13. What must be established before an arrest warrant can be issued?

a. Definitive proof
b. Probable cause
c. Witness testimony
d. Physical evidence

14. Which organization was established during Theodore Roosevelt's presidency?
a. DEA
b. ATF
c. FBI
d. USPIS

15. What type of evidence is particularly associated with burglary cases?
a. Blood analysis
b. Handwriting analysis
c. Tool mark evidence
d. Voiceprint analysis

16. How long after arrest must a suspect be brought before a magistrate?
a. 24 hours
b. 48 hours
c. 72 hours
d. 96 hours

17. Which forensic science pioneer published "Finger Prints" and proved their uniqueness?
a. William Herschel
b. Francis Galton
c. Henry Faulds
d. Alphonse Bertillon

18. What is the primary responsibility of the Photography Unit in a crime lab?
a. Document examination
b. Recording and examining physical evidence
c. Fingerprint analysis
d. Toxicology testing

19. Which type of law is often referred to as "law on the books"?
a. Common Law
b. Civil Law
c. Statutory Law
d. Administrative Law

20. What fictional character helped popularize scientific crime-detection methods?
a. Sherlock Holmes
b. August Vollmer
c. Hans Gross
d. Albert Osborn

Scientific Reasoning and Forensic Cycle Assessment

1. According to Carl Sagan's quote, what is the primary concern about modern society?
a. The overreliance on technology in daily life
b. The dangerous disconnect between scientific knowledge and technological dependence
c. The lack of funding for scientific research
d. The complexity of modern scientific concepts

2. What is the fundamental assumption that all science is based upon?
a. That experiments always yield perfect results
b. That theories can never be proven wrong
c. That the natural world behaves in a consistent and predictable manner
d. That scientific methods must follow a linear path

3. Which characteristic is NOT required for a sound scientific hypothesis?
a. It must be based on established data
b. It must be impossible to prove false
c. It must be testable
d. It must be derived from observations

4. In the context of inductive reasoning, what is the correct sequence of steps?
a. Theory development, hypothesis testing, specific observations
b. Hypothesis formation, theory development, pattern detection
c. Specific observations, pattern detection, general conclusions
d. Pattern detection, specific observations, hypothesis testing

5. How does deductive reasoning differ from inductive reasoning?
a. It moves from specific to general concepts
b. It starts with a broad theory and moves to specific tests
c. It requires no hypothesis formation
d. It cannot be used in scientific research

Forensic Trace Evidence Analysis Assessment

1. What is the primary purpose of analyzing trace elements in forensic science?
a. To determine the age of evidence
b. To establish the source of materials and link suspects to crime scenes
c. To catalog evidence for future reference
d. To determine the time of death

2. In tool mark analysis, what microscopic features do investigators examine?
a. Chemical composition
b. Metal density
c. Striations and unique markings
d. Color patterns

3. Which paint layer is applied directly to bare metal in automotive applications?
a. Clearcoat
b. Basecoat
c. Primer surfacer
d. Electrocoat primer

4. What technique is used to analyze the volatile components of paint?
a. Gas Chromatography-Mass Spectrometry

b. X-ray Diffraction
c. Infrared Spectroscopy
d. Polarizing Light Microscopy

5. Which organization maintains the Paint Data Query (PDQ) database?
a. FBI
b. Scotland Yard
c. Royal Canadian Mounted Police
d. Interpol

6. What component of paint provides color and opacity?
a. Solvents
b. Additives
c. Binders
d. Pigments

7. Why is soil considered valuable forensic evidence?
a. It's easy to analyze
b. It's rare to find
c. It's ubiquitous and unique to locations
d. It dissolves quickly

8. What technique is used to identify specific minerals in soil samples?
a. Stereomicroscope
b. Polarizing Light Microscope
c. Gas Chromatography
d. Infrared Spectroscopy

9. What does gray or black coloring in soil typically indicate?
a. Presence of organic material
b. High mineral content
c. Water damage
d. Chemical contamination

10. Which paint layer provides UV protection and scratch resistance?
a. Primer surfacer
b. Basecoat
c. Electrocoat
d. Clearcoat

11. What is the primary function of binders in paint?
a. To provide color
b. To hold pigments together
c. To speed up drying
d. To add texture

12. Which analysis method identifies the elemental composition of soil?
a. X-ray Diffraction
b. Stereomicroscope
c. ICP-MS
d. Infrared Spectroscopy

13. What can bullet composition analysis determine?
a. The shooter's identity
b. The manufacturer and firearm type
c. The bullet's trajectory
d. The shooting distance

14. What aspect of paint helps forensic experts individualize evidence?
a. Color alone
b. Chemical composition
c. Multiple specialized layers
d. Manufacturing date

15. What type of evidence was crucial in the Gary Ridgeway case?
a. Paint samples
b. Tool marks
c. Soil evidence
d. Metal particles

Paint, metals, soil Answer Key (Always review AI generated answers for accuracy)

Forensic Cycle and Reasoning Answer Key

Introduction Answer Key (Always review AI generated answers for accuracy):

Ethics Answer Key

Crime Scene Answer Key: