Forensic Science Lab Final Exam
Fingerprint correct answersFriction ridges formed on the fingertips during
gestation
Latent print correct answersInvisible to the naked eye
Visible (patent) print correct answersmade by fingers that came into
contact with a colored substance (such as blood or grease)
Plastic print correct answersimpressions left on a soft material (such as
dust or wax)
Principles of fingerprints correct answers1) no two individuals have been
found to have the same ridge characteristics
2) fingerprints remain unchanged during one's lifetime
3)fingerprints have general patterns that allow for systematic
classification Three basic classes of fingerprints: correct
answersloop, whorl, and arch
Loops correct answersridges enter from one side of the print, re-curve, and
exit from the same side
Whorls correct answers- contain at least 2 deltas
- ridges are generally circular
Arches correct answers- Contain no deltas
- ridges enter from one side of the print, rise, and exit the opposite side
Analysis correct answersobserving the print; determining patterns, ridge
characteristics, & details
Comparison correct answerscomparing the latent print to a
known print Evaluation correct answersconclusion about the
comparison
Verification correct answersadditional ACE examination from a second,
independent, qualified examiner
Dusting powder correct answers- applied with a fiberglass or camel hair
brush
, - adhere to sweat residues or oil deposits
Magnetic powder correct answersuseful for leather, rough plastics, or
textured surfaces
Fluorescent powders correct answersto visualize print without
background surface interference
Iodine fuming correct answers-must be photographed immediately
Ninhydrin correct answers- forms a purple color in the presence of
amino acids
- good for porous surfaces (like paper)
Silver nitrate correct answers-develops prints on porous articles
- turns black when exposed to UV
Super-glue fuming correct answers- the fumes of the glue adhere to the
ridges and form a white print on non-porous materials
- good for smaller objects
inking correct answersrolling fingers in ink & placing prints onto
fingerprint cards for filing
Digital scanning correct answersscanner images fingerprints & stores
images of known prints
Integrated Automated Fingerprint Identification System correct answers-
fingerprint database maintained by FBI
- Contains 10-print submissions for more than 55 million people
Locard's exchange principle correct answerswhenever two objects come
into contact with one another, there is an exchange of materials between
them
Evidence correct answersanything that can be used to demonstrate the
truth of an assertion
Direct evidence correct answersstands on its own to
prove a fact Circumstantial evidence correct answersFact
to infer another fact
Class characteristics correct answersparticular group with similar
characteristics Individual characteristics correct answersidentifies an
individual; unique
Fingerprint correct answersFriction ridges formed on the fingertips during
gestation
Latent print correct answersInvisible to the naked eye
Visible (patent) print correct answersmade by fingers that came into
contact with a colored substance (such as blood or grease)
Plastic print correct answersimpressions left on a soft material (such as
dust or wax)
Principles of fingerprints correct answers1) no two individuals have been
found to have the same ridge characteristics
2) fingerprints remain unchanged during one's lifetime
3)fingerprints have general patterns that allow for systematic
classification Three basic classes of fingerprints: correct
answersloop, whorl, and arch
Loops correct answersridges enter from one side of the print, re-curve, and
exit from the same side
Whorls correct answers- contain at least 2 deltas
- ridges are generally circular
Arches correct answers- Contain no deltas
- ridges enter from one side of the print, rise, and exit the opposite side
Analysis correct answersobserving the print; determining patterns, ridge
characteristics, & details
Comparison correct answerscomparing the latent print to a
known print Evaluation correct answersconclusion about the
comparison
Verification correct answersadditional ACE examination from a second,
independent, qualified examiner
Dusting powder correct answers- applied with a fiberglass or camel hair
brush
, - adhere to sweat residues or oil deposits
Magnetic powder correct answersuseful for leather, rough plastics, or
textured surfaces
Fluorescent powders correct answersto visualize print without
background surface interference
Iodine fuming correct answers-must be photographed immediately
Ninhydrin correct answers- forms a purple color in the presence of
amino acids
- good for porous surfaces (like paper)
Silver nitrate correct answers-develops prints on porous articles
- turns black when exposed to UV
Super-glue fuming correct answers- the fumes of the glue adhere to the
ridges and form a white print on non-porous materials
- good for smaller objects
inking correct answersrolling fingers in ink & placing prints onto
fingerprint cards for filing
Digital scanning correct answersscanner images fingerprints & stores
images of known prints
Integrated Automated Fingerprint Identification System correct answers-
fingerprint database maintained by FBI
- Contains 10-print submissions for more than 55 million people
Locard's exchange principle correct answerswhenever two objects come
into contact with one another, there is an exchange of materials between
them
Evidence correct answersanything that can be used to demonstrate the
truth of an assertion
Direct evidence correct answersstands on its own to
prove a fact Circumstantial evidence correct answersFact
to infer another fact
Class characteristics correct answersparticular group with similar
characteristics Individual characteristics correct answersidentifies an
individual; unique
