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23 Cards in this Set
- Front
- Back
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Class Evidence |
material that connects an individual or thing to a certainn group |
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Comparison Microscope |
a compound microscope that allows the side by side comparison of samples, such as of hair or fibers |
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cortex |
the region of a hair located outside of the medulla containing granules of pigments |
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cuticle |
the tough outer covering of a hair composed of overlapping scalws |
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hair follicle |
the actively growing root or base of a hair containing DNA and living cells |
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individual evidence |
a kind of evidence that identifies a particular person or thing |
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keratin |
a type of fibrous protein that makes up the majority of the cortex of a hair |
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medulla |
the central core of a hair fiber |
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melanin granules |
bits of pigment found in the the cortex of a hair |
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neutron activation analysis |
a method of analysis that determines composition of elements in a sample |
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trace evidence |
small but measurable amounts of physical or biological material found at a crime scene. |
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amorphous |
without a defined shape; fibers composed of loose arrangement of polymers that are soft, elastic, and absorbing |
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crystalline |
regularly shaped fibers composed of polymers packed side by side, which make it stiff and strong |
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direct transfer |
the passing of evidence, such as fiber, from victim to suspect |
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fiber |
the smallest indivisible unit of a textile, it must be at least 100 times longer than wide |
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mineral fiber |
a collection of mineral crystals formed into recognizable patterns |
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monomer |
a small molecule that may bond to other monomers to become a polymer |
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natural fiber |
a fiber produce naturally and harvested by animals and plants |
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polymer |
a substance composed of long chains and repeating units |
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synthetic fiber |
a fiber made from man made material |
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secondary transfer |
the transfer of evidence such as a fiber from a source to a person to another person |
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textile |
a flexible, flat material made by interlacing yarns |
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yarn |
fibers that have been spun together |
