Forensic science Flashcards

14098190028	What percentage has the innocence project found up to wrongful conviction cases resulted from flawed eyewitness testimony?	87%	0
14098190029	What is our ability to observe affected by?	The enviroment, and the natural filters of sensory details in our brain	1
14098190030	What are the 5 types of evidence?	Physical - fingerprints Biological - DNA Trace - small amount of both physical and biological Class - broke down into categories Direct - DNA and fingerprint (individualized)	2
14098190031	3 parts of hair shaft	Medulla - middle part core Cuticle - out side part Cortex - inner part right out side of medulla	3
14098190032	Proteins found in hair shaft	Keratin - makes of the hair and fingernails	4
14098190033	Hair evidence has been used since what century?	19th	5
14098190034	Three stages of Hair development	Anagen (growth) Catagen (resting) Telogen (dormancy)	6
14098190035	fibers are what type of evidence	class evidence	7
14098190036	What ways are fibers gathered?	Tape, forceps, a vacuum, or a sticky lint roller	8
14098190037	Two types of Fibers?	Natural - Cotton Synthetic - Man made	9
14098190038	How may Fibers be analyzed?	Polarized light microscopy Infrared spectroscopy Burn tests Test for solubility	10
14098190039	Type of Fingerprints?	Latent - not visible on unaided eye Plastic - Indentation Patent - visible	11
14098190040	Characteristics of Fingerprints?	Loops, Arches, Whurls	12
14098190041	When are fingerprints formed?	At about 10 weeks in the womb	13
14098190042	Fingerprint Ridge	Lines on the FIngerprint	14
14098190043	minuate	Breaks in the lines of fingerprints	15
14098190044	Delta	Triangle piece in fingerprint	16
14098190045	core	Center part of fingerprint	17
14099843356	What can the characteristics of blood drops on surfaces show?	Direction of blood movement Location of source of blood Indicate the nature of the wound producing blood	18
14099843357	Blood consists of?	Cellular components Plasma - containing dissolved ions, proteins, and other substances	19
14099843358	Blood types result from what?	Presence of antigens on surface of red blood cells	20
14099843359	What type of evidence is blood?	class evidence Direct ( only through white blood cells - which contains DNA)	21
14099843360	What can investigators use to reveal hidden blood spatter?	Luminol	22
14099843361	What has helped enhance detection of forged documents, increased quantitative analysis, and improved objectivity?	Technological advances - biometric signature pads, and infrared spectroscope	23
14099843362	What type of evidence is Glass?	Class	24
14099843363	How is density of an object measured?	It's mass divided by its volume	25
14099843364	What side is larger the exit hole or the entry hole? (Bullet)	Exit Hole	26
14099843365	What methods do Forensic Scientists use on Glass?	Fracture Matching Scanning electron microscopy of headlight filaments after collisions Use XRF ( X-Ray fluorescence) Also ICP-MS (inductively coupled plasma-mass spectrometry)	27
14099843366	radial fracture	Side of glass opposite the point of impact	28
14099843367	Concentric Fracture	Occur on side same as the point of impact	29
14099843368	The Three Types of Impressions?	Patent - Visible Latent - Non visible without help Plastic - Indentation	30
14099843369	Impressions are what type of evidence?	Class	31
14099843370	Dental Impressions are what type of evidence?	Class ( depending on points of comparison )	32
14099843371	Types of tire impressions are?	Skid marks Yaw marks Scrubs	33
14099843372	Three categories of tool marks?	Indentation marks Abrasion marks Cutting Marks	34
14099843373	What organizations are establishing guidelines?	Scientific Working Groups and Organization of Scientific Area Committees	35