Types of Glass
Fractures
Density
Scenerios
Miscellanous
100
bulletproof
What is thicker than ordinary glass, has at least 2 layers and may contain a plastic inner layer?
100
radial
What is the type of fracture that radiates out from the origin of impact?
100
4.44g/mL
What is the density of a glass with a mass of 40g and volume of 9mL?
100
more than or greater than
A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment sinks, the density of the glass is __________ the density of the liquid.
100
glass
What is amorphous solid?
200
soda lead
What is the type of glass with the highest density?
200
radial
What is type of fracture that is the first to form when a force hits glass?
200
3g/mL
What is density of a glass with a mass of 30g and a volume of 10mL?
200
exit
Which bullet hole would be larger...the entry or the exit?
200
Becke line
What is it useful to find when examining refractive index?
300
tempered
What is the type of glass used in side windows of cars?
300
concentric
What is type of fracture that forms on the same side as the force?
300
2.5g/mL
What is density of a glass with a mass of 50g and a volume of 20mL?
300
hole on inside of window is narrower/smaller
A man claims his wife was shot by someone outside of his house, but the investigator knows he is lying because there is a bullet hole in the window. How does the investigator know this?
300
density, refractive index, fractures, color, thickness, fluorescence, markings
Name 3 physical characteristics of glass?
400
laminated
What is the type of glass used in the windshield of most cars?
400
higher speed
What produces fewer concentric fractures, a higher speed impact or a lower speed impact?
400
7g/mL
What is the density of glass with a mass of 35g and a volume of 5mL?
400
individual, if it fit together like a puzzle
What type of evidence is a piece of glass found at a crime scene where the glass was broken into large pieces and was able to be put back together?
400
refractive index
What is a physical property of glass regardless of its size and can be determined by making the fragment disappear in a liquid of this known property?
500
backscatter
What is the type of glass that may be found on a suspect that will link him to the crime scene?
500
laminated glass
What type of glass fractures in small cube like structures?
500
3.67g/mL
What is density of glass with a mass of 55g and a volume of 15mL?
500
he or she was off to the side to the left of the hole
Investigator notes a bullet hole is oval shaped and more glass is missing on the right side of the hole at a crime scene. What does this tell him about the location of the shooter?
500
at the one(crack) that happened first
Where does the fracture line terminate when two fracture lines meet?