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Glass Soil 2
Test Description: Next 10 questions on glass and soil
Instructions: Answer all questions to get your test result.
1) Which of the following is not a physical property of a material or substance?
A
refractive index
B
evolution of bubbles when another substance is added
C
density
D
mass
2) A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment floats on the ice surface, the density of the glass is ________ the density of the liquid.
A
less than
B
more than
C
equal to
D
it could be any of the above
3) The refactive index of a glass fragment
A
both a & b
B
is a physical property of the glass regardless of its size
C
can be detrmined making the fragment disappear in a liquid of known refractive index
D
cannot be found because fragments are too small, and not of interest to the forensic scientist
4) A piece of glass gas a bullet hole that is larger on one side of the glass that on the other. This indicates
A
the larger side is the entrance
B
the bullet was traveling at a low velocity
C
a high powered shot gun made the hole
D
the larger side is the exit
5) In examining a glass fracture pattern, the radial lines are
A
cracks that extend out from the point of impact
B
cracks known as Becke lines
C
cracks that form in circles around the point of impact
D
directional lines that seem to go nowhere
6) A man claims that someone broke into his house through the window, the investigator believes that the window was broken from the inside of the house. What evidence would lead the investigator to believe this?`
A
the edge of the window had stress marks perpendicular to the outside and parallel to the inside
B
the window hasd consentric lines in the fracture pattern
C
the window had radial lines in the fracture pattern
D
the man looked like he was lying
7) If two fracture lines meet, it is easy to determine which fracture occured first
A
the second fracture will not have concentric cracks
B
the fracture line will terminate the crack that happened first
C
it is impossible to determine which happened first
D
the fracture line will terminate the crack that happened second
8) Glass is considered to be
A
none of the above
B
an amorphous solid
C
a crystalline solid
D
a solid whose atoms are arranged in a regular pattern
9) It is useful to find the Becke line when examining
A
density
B
concentric cracks
C
radial cracks
D
refractive index
10) One method of determining if the evidence glass matches the glass from the crime scene is to compare the:
A
none of these choices
B
reflective index of the evidence glass to the reflective index of the glass from the crime scene
C
index of the evidence glass to the index of the glass from the crime scene
D
refractive index of the evidence glass to the refrective index of the glass from the crime scene
*select an answer for all questions
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