Analysis of Paint and Glass Evidence Exam Questions and Answers (Solved Papers) Trace Evidence - Correct Answers ✅Trace evidence is often analyzed as COMPARISON evidence, where known and questioned items Thus, questioned fragments (Q) are typically recovered from a suspect or victim (e.g., from clothing).These may then be compared to samples (K) from a known source.Chemical and physical properties may be compared to determine if Q may be excluded as potentially arising from the same source as K.What is glass? - Correct Answers ✅Glass is an amorphous material comprised of a variety of mineral/metal oxides - SiO2 and Al2O3, and a variety of other oxides at lower concentrations. The exact composition depends on use.Glass is available in a number of types or forms, and the composition and manufacturing processes (which influence physical properties) depend on the intended use.it is a very very thick liquid not solid. usually made out of silica which is basically melted sand. transition metals give the glass their colour Glass evidence - Correct Answers ✅very common in break and enters and hit an runs. window glass and headlight glass are very common. you can match stress lines microscopically 1 / 2
Analysis of Paint and Glass Evidence Exam Questions and Answers (Solved Papers) Fracture Patterns - Correct Answers ✅Cracks around holes may be RADIAL or CONCENTRIC.Relative sequence of fractures may be obtained from the fracture line patterns in some cases.The energetics of fractures result in observable stress lines that may indicate the directionality of the impact.Radical Cracks - Correct Answers ✅are formed commencing on the opposite side of the force, while concentric cracks happen after the incidence of the force and on the same side Holes in glass - Correct Answers ✅made by projectiles have morphology that may provide information on the directionality of the projectile.Here, the wide side of the crater represents the exit side of the glass.this is called bevelling Analysis of Glass Evidence - Correct Answers ✅In most cases, glass fragments recovered in forensic casework are usually between 0.1-1 mm in length, although occasionally larger fragments are examined.Fracture features may be almost impossible to detect in the smaller fragments commonly found.
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