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Forensics 1st Semester Review Chapters 1-4

Total questions: 100

Worksheet time: 2hrs 23mins

Name
Class
Date
1.

What a person perceives using his or her senses is a(n) perception.

(a)  

2.

We unconsciously apply filters while making observations.

(a)  

3.

Evidence that (if authentic) supports an alleged fact of a case is called trace evidence.

(a)  

4.

Class evidence can be attributed to a common source with a high degree of certainty

(a)  

5.

Hair and semen from a crime scene is a type of biological evidence.

(a)  

6.

Our brains fill in the gaps with our own ideas, enriching the situation so it will make sense.

(a)  

7.

Information collected as short term memory is stored for about 30 seconds.

(a)  

8.

Physical and trace are two types of circumstantial evidence.

(a)  

9.

Class evidence narrows an identity to

a)

a group of persons or things

b)

an individual person

c)

an individual person or thing

d)

a subgroup

10.

Circumstantial evidence is

a)

direct evidence that can be used to imply a fact but does not directly prove it

b)

indirect evidence that can be used to imply a fact but doe not directly prove it

c)

indirect evidence that cannot be used to imply a fact

d)

all the choices

11.

Which of these is NOT a type of evidence that forensic scientists might collect?

a)

Blood

b)

Hair

c)

Fingerprints

d)

Food

12.

Chain of custody must be maintained

a)

so that the evidence does not have to be examined again.

b)

or the evidence may not be admitted into court

c)

only by the first officer on the scene

d)

only by the forensic scientist who examines the evidence

e)

all of these are true

13.

During what crime scene investigation step is the crime scene isolated and taped off?

a)

Scan the scene

b)

Secure the scene

c)

Secure and collect

d)

Search the scene

14.

Crime scene sketches provide _____________ not present in photographs, video evidence, etc

a)

Positioning of evidence

b)

Condition of evidence

c)

Close-ups and details

d)

Distances and dimensions

15.
when securing a crime scene the two most important factors are to
a)
scan the scene, separate the witnesses
b)
safety of individuals, separate the witnesses
c)
see the scene, preserving evidence
d)
safety of individual, preserving evidence
16.

Which type of search pattern is shown in this image?

a)

Spiral seach

b)

Line search

c)

Grid search

d)

Zone search

17.
Which of the Seven "S's" of Crime Scene Investigation involves the proper use of chain of custody?
a)
Securing the Scene
b)
Seeing the Scene
c)
Searching for Evidence
d)
Securing and Collecting Evidence
18.

What does the Locard Exchange Principle imply?

a)

fingerprints can help identify people

b)

wherever there is contact, something is left behind (evidence)

c)

for every action there is an equal and opposite reaction

d)

there is always some type of DNA left at a crime scene

19.
Deductive Reasoning
a)
deriving the consequences from the facts using a series of logical steps
b)
the ability to identify its component parts, to organize information for decision making, to establish criteria for evaluation, and to draw appropriate conclusions.
c)
A statement or assertion of information that can be verified
d)
A statement or assertion of information that can be verified
20.
Eyewitness
a)
A person who has seen someone or something and can communicate these facts
b)
the ability to identify its component parts, to organize information for decision making, to establish criteria for evaluation, and to draw appropriate conclusions.
c)
A statement or assertion of information that can be verified
d)
Conclusions drawn from assumptions and known facts
21.
how information is processed in the brain
a)
informatin from our senses, what we pay attention to, perception, short-term memory, long-term memory
b)
What a person perceives using his or her senses
c)
A statement or assertion of information that can be verified
d)
Conclusions drawn from assumptions and known facts
22.
Logical
a)
Conclusions drawn from assumptions and known facts
b)
What a person perceives using his or her senses
c)
A statement or assertion of information that can be verified
d)
deriving the consequences from the facts using a series of logical steps
23.

Dirt, pollen, hair, skin cells, and carpet fibers are all ______.

a)

DNA

b)

forensic science

c)

tool marks

d)

trace evidence

24.

Which form of evidence can be associated with a group?

a)

Class

b)

Inidiviudal

c)

Testimonial

d)

Transient

25.

This evidence can be traced to a single source.

a)

Transient

b)

Individual

c)

Class

d)

Circumstantial

26.

What do we use to gather information around us?

a)

news

b)

friends

c)

our 5 senses

d)

sight only

27.

Good observation skills come naturally to investigators. They do not need to be trained.

a)

true

b)

false

28.

If we remember seeing something happen, we can trust that it happened just as we think it did.

a)

true

b)

false

29.

Most wrongful convictions seem to be the result of faulty eyewitness testimony.

a)

true

b)

false

30.

Forensics derives from the Latin word, forensis, which means

a)

of the day

b)

of the month

c)

of the consensus

d)

of the forum

31.

One of the most important tools of the forsensic investigator is the abilty to:

a)

observe, interpret, and report

b)

report assumptions clearly

c)

observe assumptions clearly

d)

all of the choices

32.

Eyewitness accounts of crime-scene events vary considerably from one person to another. What you observe depends on your level of

a)

document, research, and evaluation of evidence

b)

stress, opinion, body language of everyone involved

c)

prejudices, motives and level of interest

d)

proper explanations, perception and recording evidence

33.

A good observer will

a)

rely on their perception of the data collected

b)

interpret the data first before collecting it

c)

work frontwards and find evidence that led up to the crime

d)

collect information before interpreting the data

34.

Is this hair animal or Human?

a)

Animal

b)

Human

35.

What medulla pattern is shown?

(a)  

36.

What cuticle pattern is shown?

(a)  

37.

Is this hair animal or Human?

a)

Animal

b)

Human

38.

How would you describe this cuticle?

a)

Absent

b)

Can't tell difference between the cuticle and cortex

c)

thick and dark

d)

continuous

39.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

Continuous medulla pattern is one unbroken line of color.

(a)  

40.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

Mitochondrial DNA is inherited from the mother, who inherited it from her father, and so on.

(a)  

41.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

The follicle of a hair can be analyzed for nuclear DNA.

(a)  

42.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

A hair consists of two parts: a follicle and a cortex.

(a)  

43.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

Bits of pigment found in the cortex of a hair is called melanin granules.

(a)  

44.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

In humans, the cortex is the largest part of the hair shaft.

(a)  

45.

True or False: Write true but if false, change the identified word or phrase to make the statement true.

The hair shaft is made up of three layers: an inner medulla, outer medulla, and outer cuticle.

(a)  

46.

Name the types of cuticle in the order pictured.

a)

imbricate, coronal, spinous

b)

catogen, telogen, anagen

c)

spinous, coronal, imbricate

d)

imbricate, spinous, coronal

47.

All mammals have hair. Its main purpose is to

a)

regulate body temperature by insulating the body

b)

protect the body from rugged terrain

c)

protect the body from an attack

d)

none

48.

Investigators recognized the importance of analysis of hair as

a)

primary evidence in criminal investigations in the late 1880s

b)

direct evidence in criminal investigations in the late 1880s

c)

trace evidence in criminal investigations in the late 1880s

d)

secondary evidence in criminal investigations in the late 1880s

49.

Which racial type of hair is oval in shape?

a)

caucasian

b)

east asian

c)

african american

d)

east asian and african american

50.

The type of protein made up of a chain of amino acids that make hair both strong and flexible is

a)

cuticle

b)

kertain

c)

medulla

d)

none

51.

What is shown in the picture?

a)

the effects of head lice for years at a time

b)

the effects of bed bugs

c)

alopecia

d)

early onset baldness

52.

The central core of a hair fiber is called

a)

cortex

b)

medulla

c)

pigment

d)

cuticle

53.

The rate of hair growth is important to know because it can help determine the last time hair was chemically treated. Human hair grows at which rate?

a)

1.3 cm/year

b)

1.3 cm/week

c)

1.3 cm/month

d)

1.3 cm/day

54.

Through hair analysis, scientists can determine

a)

what food was digested less than 6 hours before death

b)

or get an indication of where the person lived by the water they drank

c)

the cause of death

d)

or get an indication of where the person lived be the food eaten.

55.
Type of cuticle
a)
coronal
b)
spinous
c)
imbricate
d)
fragmented
56.

What are the tree stages of hair growth in order from start to end?

a)

Anagen, telogen, and catagen

b)

anagen, catagen, and telogen

c)

telogen, catagen, and anagen

d)

catagen, telogen, and anagen

57.

Animal hair can distinguished from human hair because animal hair

a)

does not have a cuticle

b)

has smaller medullary index than human hair and no cortex

c)

has a greater medullary index and more variation in the cuticle patterns

d)

always has a continuous medulla pattern

58.

Forensic scientists distinguish ____typesof hair on the human body.

a)

4

b)

5

c)

6

d)

7

59.

What medulla pattern is represented here?

a)

no medulla

b)

interrupted

c)

fragmented

d)

continuous

60.

If hairs found at the crime scene do not contain DNA, it cannot be used to determine the identity of the person but it can (pick all that are correct)

a)

A. determine the hair color

b)

B. determine the race

c)

C. determine the gender

d)

D. determine if the hair has been color treated

e)

E. determine the age range of the person

61.

What is the thickest layer of the hair?

a)

cortex

b)

medulla

c)

cuticle

d)

both the medulla and cuticle

62.

The region of a hair located outside the medulla containing granules of pigment is called

a)

the hair follicle

b)

the cuticle

c)

the cortex

63.

Since the hair grows out of the skin, chemicals that the skin absorbs can become incorporated into the hair. Ingested or absorbed toxins can be detected by chemical analysis of hair. These ingested or absorbed toxins include

a)

arsenic

b)

drugs

c)

lead

d)

all of them

64.

Hair can adhere to clothes, carpets and many other surfaces and be transferre4d to other locations. This is called

a)

primary transfer

b)

secondary transfer

c)

redundant transfer

d)

tertiary transfer

65.

Microscopic hair analysis

a)

is used to exclude a suspect

b)

yields individual evidence

c)

can prove a suspect's guilt

d)

is used to include a suspect

66.

If a person has been drug free for over a year, traces the drugs will

a)

NOT be visible in any part of the hair

b)

be unknown, not enough information is given

c)

be traceable in different sections of the hair depending on the race of the individual

d)

appear in the hair only after roughly 16 cm

67.
Which phase of hair growth usually lasts three to five years?
a)
anagen
b)
catagen
c)
telogen
d)
melanen
68.
We know hair is from a human if…
a)
The medullary index is 0.5 or greater           
b)
The medullary index is 0.33 or less
c)
The cuticle is coronal
d)
The medulla is fragmented
69.

This fiber is most likely...

a)

cotton

b)

hemp

c)

rayon

d)

impossible to tell

70.

This weave pattern is known as...

a)

plain

b)

twill

c)

satin

d)

knitted

71.

Early collection of fibers in an investation is extremely critical. Within 24 hours, an estimated

a)

0% of all fibers may have fallen from a victim or been lost from a crime scene.

b)

50% of all fibers may have fallen from a victim or been lost from a crime scene.

c)

75% of all fibers may have fallen from a victim or been lost from a crime scene.

d)

95% of all fibers may have fallen from a victim or been lost from a crime scene.

72.

Mineral fibers such as asbestos are very durable. These fibers have been used in all of the following EXCEPT

a)

shingles

b)

floor tiles

c)

rope

d)

brake linings

73.

Angora hair is from a(n)

a)

donkey

b)

goat

c)

rabbit

d)

alpaca

74.

What synthetic fiber is wrinkle-resistant

a)

cotton

b)

polyester

c)

olefins

d)

nylon

75.

This pattern is when the weft is woven over 3 or more warps and then under one then in the next row the pattern is shifted in either direction by one warp

a)

plain

b)

basket

c)

twill

d)

leno

76.

Which of the following statements TRUE about silk

a)

silk is collected from an adult caterpillar only in the wild

b)

is collect from the cocoons of caterpillars a few weeks before the caterpillar hatches

c)

cocoon is unwounded by a special/sensitive material

d)

cocoon is unwound by hand

77.

This regenerated fiber is found in most carpets and the cellulose is chemically combined with acetate

a)

rayon

b)

celanese

c)

polyamide nylon

d)

polyester

78.

The shiny nature of silk can be related to

a)

its hollow core

b)

its ability to reflect light

c)

its smooth, round fibers

d)

mucus secretions from the silkworm

79.

Fibers that have been spun together are called

a)

a texile

b)

yarn

c)

a mineral fiber

d)

a fiber

80.

When fibers are transferred directly from victim to suspect or suspect to victim, this is called:

a)

necessary transfer.

b)

absolute transfer.

c)

direct transfer.

d)

None of these choices.

81.

The transfer of evidence such as a fiber from a source to a person, then to another person, is called:

a)

primary transfer.

b)

secondary transfer.

c)

tertiary transfer.

d)

direct transfer.

82.

Nylon is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

83.

A forensic scientist performs a burn test and finds that the fiber melts when it is put in the flame. This suggests that the fiber is…

a)

A synthetic fiber

b)

A natural fiber

84.

This weave pictured is

a)

Satin

b)

Plain

c)

Twill

85.

What kind of weave pattern is shown?

a)

twill

b)

satin

c)

knitted

d)

loops

86.

Which is NOT an animal fiber?

a)

hemp

b)

mohair

c)

angora

d)

wool

87.

Synthetic fibers are made from

a)

petroleum and natural gas

b)

minerals and rock

c)

mined metals and ore

d)

chemically altered plant and animal matter

88.

Fiberglass is a fiber form of:

a)

proteins.

b)

cellulose.

c)

glass.

d)

polymers.

89.

What is this?

a)

animal hair

b)

human hair

c)

fiber

90.

Which type of fiber is shown?

a)

wool

b)

rayon

c)

cotton

d)

nylon

91.

A ______________ is the lengthwise yarn and the __________ is the crosswise yarn that goes over and under to form a weave pattern.

a)

warp; weft

b)

weft; warp

c)

weave; warp

d)

warp; weave

92.

Alternating warp and weft threads describe which weave pattern?

a)

Plain

b)

Basket

c)

Twill

d)

Satin

93.

On weaving patterns, they consist of arranging lengthwise threads that are side by side and close together. This is called?

a)

weaving

b)

warp

c)

weft

d)

none

94.
Asbestos and fiberglass are classified as ________ fibers
a)
natural
b)
synthetic
c)
regenerated
d)
polymer
95.
In a burn test, these fibers will often shrink back away from the flame.
a)
Synthetic
b)
Natural
96.
Destructive methods such as burning and dissolving in acids are the best way to identify fibers:
a)
true 
b)
false
97.

Which fiber under a microscope has a hollow core that is not always visible?

a)

cotton

b)

flax

c)

silk

d)

wool

98.

Which synthetic fiber below is a substitute for fur?

a)

Olefins

b)

Polyester

c)

Nylon

d)

Acrylic

99.

When burned, wool forms

a)

black residue

b)

a hard bead

c)

gray fluffy ash

d)

wool is fire resistant

100.

Which fiber is self extinguishing, so pajamas are great to be made of this fiber

a)

cotton

b)

rayon

c)

polyester

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