Question | Answer |
Paint as physical evidence is most frequently encountered in | burglary and hit and run |
which property imparts paint with its most distinctive forensic characteristics | color-layer sequence |
what is the main ingredient in ordinary glass | sand |
Tempered glass is used in | the side and rear windows of autos manufactured in the United States |
Flotation is a method used by scientists to determine the ____ of a particle of glass | density |
which is a true statement about the fracturing of glass? | radial cracks appear first, starting on the side opposite the destructive force. |
The fracture pattern of glass usually has | radial and concentric lines |
what is the logical first step in soil analysis | comparison of dried soil sample for color and texture |
automobile finishes typically contain which layers | an electrocoat primer, colorcoat, and clearcoat |
Pyrex glass | is made with the addition of boron oxide |
if an object is immersed in a liquid of greater density, it will | float |
the process of a glass prism separating sunlight into component colors is called | dispersion |
the refractive index of a substance varies woth | temperature, color of light passing through, wavelength of light passing through |
a(n)____property describes the behavior of a substance without reference to any other substance while a(n)___ property describes the behavior of a substance when it reacts or combines with another substance | Physical;Chemical |
the basic metric unit for volume is the | liter |
color and texture comparisons cannot be made on samples until they are all __ with identical laboratory procedures | dried |
naturally occurring crystals commonly found in soils are | minerals |
the fracture lines radiating outward from a crack in glass are known as ___ fractures | radial |
Glass fracture lines that encircle the hole in the glass are known as __ fractures | concentric |
The examinatio of a paint chip found on a hit and run victim's garment side by side with paint removed from a vehicle suspected of being involved in the incident is an example of | comparison |
when a forensic analyst determines the chemical composition of preparations that may contain illicit drugs such as heroin, cocaine, or barbiturates, this is an example of | identification |
evidence with individual characteristics can lead to a determination of common origin (single source). Which type of evidence cannot yield such results | single layer paints |
the corroborative use of physical evidence means that it can be used to | provide a lead to give the investigation direction |
forensics databases are maintained for all of the following except: | dental impressions |
the combined DNA Index System (CODIS) became fully operational in what year? | 1998 |
A component of the National Integrated Ballistics Information Network is Called | IBIS |
The process by which the body temperature cools after death is known as | algor mortis |
A forensic anthropologist may help to create a(n) ___ to help with the identification of the victim | facial reconstruction |
A corps was discovered in an apartment last November. it was that of a 50 year old male who died of a heart attack. at the time of discovery, the body temperature was determined to be 89F. what is the most probable post mortem interval | 7 hours |
The computerized database used to store DNA information is | CODIS |
if the laboratory can piece broken glass from a window or headlight together, then the evidence has ___ characteristics | individual |
the likelihood of finding class physical evidence is ___ the likelihood of finding physical evidence with individual characteristics | greater than |
if an object is immersed in a liquid of greater density, it will | float |
The refractive index of a substance varies with | temperature, color of light passing through, wavelength of light passing |
What types of evidence would be expected to have trace elements | soil and gun primer particles, glass and metal objects, plant and bullet fragments |
A compound microscope is equipped with two objectives lenses (10x and 45x) and has a 10x ocular lens. The highest magnification attainable with this instrument is | 450x |
The number and type of tests needed to identify a substance must be sufficient to __all other substances from consideration | exclude |
evidence associated with a group and not to a single sources is said to posses ___ characteristics | class |
modern analytical techniques have become so sensitive that the forensics expert must be aware of the __ among materials when interpreting the significance of comparative data. | natural variates<<<(can't read his writing) |