Forensics Test 1&2

Question 1

What is one function of a forensic scientist?

Answer 1

To supply accurate and objective information that reflects the events that occurred at a crime

Question 2

What is the first thing do at a crime scene?

Answer 2

Secure and isolate the crime scene

Question 3

What are three ways to record the crime scene?

Answer 3

Photography, Sketches, Notes

Question 4

Four Search Methods

Answer 4

Spiral Search, Grid Method, Strip or Line Search, Quadrant or Zone Search

Question 5

What are two pieces of physical evidence that should be collected from the victim’s body?

Answer 5

Head and Pubic Hair

Blood (for DNA typing)

Question 6

Chain of Custody

Answer 6

A list of all persons who come into possession of an item

Question 7

Why do you need to collect control specimens?

Answer 7

They can be compared to crime scene evidence

Question 8

Can scientific evaluation of crime scene evidence usually overcome the results of a poorly conducted criminal investigation?

Answer 8

No

Question 9

What is probability?

Answer 9

The frequency of occurrence of an event

Question 10

What are individual characteristics?

Answer 10

Evidence that can be traced to a common source with an extremely high degree of probability

Question 11

What are class characteristics?

Answer 11

Evidence that is associated with a group and not to a single source

Question 12

What is an expert witness?

Answer 12

An individual whom the court determines possesses particular skill or knowledge in a trade or profession relevant to the trial that will aid in determination of truth

Question 13

What is forensic science?

Answer 13

The application of science to the law

Question 14

What are two allowances made to justify a warranties search?

Answer 14

To prevent the immediate loss or destruction of evidence

Emergency Situations

Question 15

What is chromatography?

Answer 15

A method of separating parts of a mixture to identify unknowns

Question 16

What is a mixture?

Answer 16

A combination of 2 or more pure substances

Question 17

How does chromatography separate different parts?

Answer 17

Size and weight

Question 18

What are the two ways glass fractures?

Answer 18

Concentric

Radial

Question 19

What are two ways to compare a piece of suspect glass with a control sample

Answer 19

Density and reconstruction

Question 20

What is important from taking a photography of a crime scene?

Answer 20

That the crime scene is in unaltered condition

Question 21

What is identification?

Answer 21

The process of determining a substances physical or chemical identity

Question 22

What is comparison?

Answer 22

The process of ascertaining whether two or more objects have a common origin

Question 23

What is a control?

Answer 23

Evidence of known origin

Question 24

What is a solvent?

Answer 24

Something used to separate parts of a mixture in chromatography

Question 25

Who is responsible for maintaining the chain of custody?

Answer 25

Every person who handled or examined the evidence

Question 26

What is the purpose of a rough sketch?

Answer 26

To show the dimensions and pertinent objects of the crime scene

Question 27

Do the techniques of physical evidence collection require a highly skilled individual who must specialize in this area of investigation?

Answer 27

yes

Question 28

How do you calculate density?

Answer 28

Mass divided by Volume

Question 29

What is a radial fracture?

Answer 29

A crack in a glass that extends outward like the spoke of a wheel from the point at which the glass was struck

Question 30

What is a concentric fracture?

Answer 30

A crack in a glass that forms a rough circle around the point of impact

Question 31

Which occurs first, radial or concentric cracks?

Answer 31

Radial cracks

Question 32

What is the 3R Rule?

Answer 32

Radial cracks form a right angle on the reverse side of the force