FRSC 200 FINAL EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
What kind of evidence is glass evidence?
Class evidence
What are characteristics of glass?
-amorphous solid
-pure form made of Si and O2
-high melting point
-hard/brittle
What are the different types of glass?
-float glass/soda lime glass: windows, picture frames
-tempered glass: auto glass, safety glass
-borosilicate glass: lab glassware, kitchen items
-tinted glass: for decorative use
-leaded glass (crystal): wine glass, fine dining
How is sequences of fractures performed? What is looked at?
Order of events, look at radial and concentric fracture lines
How is the direction of force of a bullet through glass determined?
entry: small hole, smooth surface
exit: wide hole, crater shape, rough surface
What are the class characteristics of glass that can be analyzed by most labs?
, - physical appearance
- color
- density
- refractive index
What is refractive index?
the ratio of the velocity of light in a vacuum to its velocity in a medium
Is refractive index useful for glass analysis?
Yes, it is useful
What kind of evidence is soil evidence?
crushed rocks and minerals mixed with decayed plant and animal material
What are characteristics of soil?
color
Are fibers class evidence?
Yes, no amount of testing allows for individualization
Can fibers be individualized?
No, they cannot
What are the major sources of fiber?
Natural and synthetic
What is an example of a semi-synthetic fiber?
Rayon, which is made from wood pulp residue
What types of examinations are performed in the analysis of fibers?
- Comparison microscopy
- Polarized light microscopy
COMPLETE SOLUTIONS VERIFIED
What kind of evidence is glass evidence?
Class evidence
What are characteristics of glass?
-amorphous solid
-pure form made of Si and O2
-high melting point
-hard/brittle
What are the different types of glass?
-float glass/soda lime glass: windows, picture frames
-tempered glass: auto glass, safety glass
-borosilicate glass: lab glassware, kitchen items
-tinted glass: for decorative use
-leaded glass (crystal): wine glass, fine dining
How is sequences of fractures performed? What is looked at?
Order of events, look at radial and concentric fracture lines
How is the direction of force of a bullet through glass determined?
entry: small hole, smooth surface
exit: wide hole, crater shape, rough surface
What are the class characteristics of glass that can be analyzed by most labs?
, - physical appearance
- color
- density
- refractive index
What is refractive index?
the ratio of the velocity of light in a vacuum to its velocity in a medium
Is refractive index useful for glass analysis?
Yes, it is useful
What kind of evidence is soil evidence?
crushed rocks and minerals mixed with decayed plant and animal material
What are characteristics of soil?
color
Are fibers class evidence?
Yes, no amount of testing allows for individualization
Can fibers be individualized?
No, they cannot
What are the major sources of fiber?
Natural and synthetic
What is an example of a semi-synthetic fiber?
Rayon, which is made from wood pulp residue
What types of examinations are performed in the analysis of fibers?
- Comparison microscopy
- Polarized light microscopy
