CHEM 101 Test 1

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1
Define Forensics
To put up for debate
2
Who is Edmond Locard. What did he do?
A french criminologist who created the first crime lab in France.
3
What is the Locard Exchange Principle?
When 2 things come into contact then transference will always occur.
4
Who is Paul Kirk?
Was head of criminalistics department in the US
5
Who is Francis Galton?
Father of Fingerprints
6
What is the FBI?
Federal Burea of Investigation focuses on domestic and international terrorism, civil rights and violent crimes.
7
What is Behavioral Science? (Profiling)
The study/analysis of human behavior.
8
What is the DEA?
Drug Enforcement Agency deals with the investigation and preparation for prosecution of drug gangs and criminal threats.
9
What is the ATF?
Alcohol, Tobacco, Firearms and Explosives focuses on the protection of communities from the distribution of illegal weapons and products.
10
What is Forensic Anthropology?
The study of bones.
11
What is the order of duties at a crime scene?
Secure the scene, Render Aid, Isolate the scene, Observe the scene, Document the scene, Collect evidence.
12
How can you document a crime scene?
Crime scene sketch, Photographing crime scene, Notes on crime scene.
13
Why would disposable forceps be used?
To reduce cross contamination and spread of infection.
14
What is Entomology?
The study of insects
15
What is pathology?
The study of disease
16
What is the "Druggist fold" used for?
To package loosed or tiny items.
17
What is a identification exam?
The process of determining a substance's physical or chemical identity.
18
What is a comparison exam?
The process of ascertaining whether two or more objects have a common origin.
19
Why must air tight containers be used for gasoline?
Because the substance is volatile and can evaporate.
20
Are the striations on a bullet class or individual identification?
Individual identification.
21
What is Serology?
The study and identification of bodily fluids such as blood, sweat and semen.
22
What is toxicology?
The analysis of biological samples for the presence of toxins.
23
What is the Frye rule?
Testimonies based off scientific principles or procedures are only allowed if acceptable in the field.
24
What is chain of custody
The documentation of everyone who handled a piece of evidence. Name, date and time.
25
What is the product rule
A calculation that gives the odds of an evidence being matched to someone.
26
When is a search allowed without a warrant?
When consent is given, to render aid or if evidence is about to be lost or destroyed.
27
What is fourth amendment?
The right of the people to be secure in their homes without having to be worried about unlawful searches or seizures.
28
What is CODIS?
Combined DNA Index System operates multiple databases of DNA profiles of missing people, convicted criminals and evidence at crime scenes.
29
What is IBIS?
Integrated Bullet Identification System specializes in comparing both types of ballistic evidence found at crime scenes.
30
What is AFIS?
Automated Fingerprint Identification System specializes in fingerprint and palmprint identification of convicted criminals and applicant records.
31
What is Expirated blood pattern?
Blood expelled from mouth or nose due to internal injury.
32
What is Arterial spray?
Spatter created from main artery or heart.
33
What is Cast off pattern?
Spatter produced by fist or object as it flings blood in an arc.
34
What is Impact spatter?
Occurs when an object impacts the source of blood.
35
What is skeletonization?
Edge of blood stain drying to surface.
36
What are the 3 types of Impact spatter. What causes each one?
Low velocity spatter, medium velocity spatter and high velocity spatter. Gravity or splashing, Blunt force trauma, Gunshot wound or explosion.
37
What is area of convergence?
Point on a 2-dimensional plane from which drops originated
38
What is area of origin?

An area in 3-dimensional space from which the blood originated
39
How to calculate impact angle from blood drops?
Sin of A = (width of blood drop / length of blood drop) <- Take inverse sin of this for angle
40
Difference between cause of death and manner of death?
Cause of death is what killed a person specifically while manner of death is the legal ramifications or more broad term.
41
How can you determine carbon monixiding poisoning?
Cherry-red blood discoloration
42
How can you determine strangulation?
Hemorrhages in eyelids (petechiae), thyroid cartilage broken.
43
What three terms help determine time of death?
Algor Mortis, Livor Mortis, Rigor Mortis.
44
What is Livor Mortis?
Settling of the blood, discoloration of skin. Occurs from 1 to 16 hours after death.
45
What is Algor Mortis?
Loss of body temperature, About 1 degree per hour drop.
46
What is Rigor Mortis?
Stiffening of the joints, happens over 24 hours but disappears after 36 hours.
47
What can an anthropologist determine at a crime scene?
Age, Height, Race and Gender
48
What can an entomologist determine at a crime scene?
Time of death, Location of wounds, Drugs ingested from bugs.
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