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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 certain 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 pigment. |
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Cuticle |
The tough outer covering of a hair composed of overlapping scales |
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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 the 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 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 a loose arrangement of polymers that are soft, elastic, and absorbing (for example, cotton) |
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Crystalline |
Regularly shaped; fibers composed of polymers packed side by side, which make it stiff and strong (for example, flax) |
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Direct Transfer |
The passing of evidence, such as a fiber, from victim to suspect or vice versa. |
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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 a recognizable pattern. |
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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 produced naturally and harvested from animal, plant, or mineral sources |
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Polymer |
A substance composed of long chains of repeating units |
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Synthetic fiber |
A fiber made from a man-made substance such as plastic |
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Secondary Transfer |
the transfer of evidence (for example, a carpet) to a person (suspect), and then to another person (victim) |
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Textile |
A flexible, flat material made by interlacing yarns (or "threads") |
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Yarn |
Fibers that have been spun together |
