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45 Cards in this Set
- Front
- Back
class
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Because fibers are mass produced, they are considered this type of evidence
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direct
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Transfer of fibers directly from suspect to victim or victim to suspect
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24
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Most fiber evidence falls off within this many hours of a crime
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color
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Scientists look at this first to try to match a fiber to a location
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polarizing
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Type of light microscope that allows scientists to use wavelengths of light to observe optical properties of fibers
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infrared
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Type of spectroscopy that allows scientists to visualize chemical structure of fibers
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staining
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A destructive test that allows scientists to compare absorption of different liquids into fabrics
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density
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A quick test used to classify fabric origins
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burn
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This type of test is used to compare melting points, odors, and ash formation of fiber samples
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chromatography
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A test used to analyze the components of dyes in a fabric
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fiber
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The smallest indivisible unit of a textile; made up of many filaments twisted or bonded together
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yarn
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Term for fibers that have been spun together
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textile
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Result of weaving yarns together
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warp
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The tight lengthwise yarn in a weave pattern
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weft
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The crosswise yarn in a weave pattern
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twill
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A diagonal weave pattern; resembles stair steps
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plain
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The simplest and most common weave pattern; looks like a checkerboard
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satin
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Weave pattern in which the Interlacing may not be uniform; results in shiny materials with little friction with other garments
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wrinkle
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Plain weave patterns are snag resistant but tend to do this
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thread count
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The number of threads that are packed together for any given amount of fabric
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natural
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Term for fibers that come from animals, plants, and mined minerals
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synthetic
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Term for man-made fibers produced from a raw material that is spun together in a factory
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fur
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Animal fiber left on the skin and treated; often used to make coats and gloves
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cashmere
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Fiber produced from goat hair
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angora
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Fiber produced from rabbit hair
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wool
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Fiber produced from sheep hair
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silkworm
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Silk comes from the cocoon of this caterpillar
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cellulose
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Plant fibers are made of this carbohydrate
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protein
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Animal fibers are made of this type of macromolecule
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seed
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Cotton comes from this part of a plant
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coconut
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Coir is most often used to make doormats and baskets and comes from this fruit
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cannabis
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Hemp comes from this plant
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stem
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Jute (used in rope, mats, handbags, and burlap sacks) comes from this part of a plant
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flax
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Plant used to make linen
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fiberglass
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A common mineral fiber; often used to insulate buildings
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asbestos
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Cancer-causing mineral found in rocks; used mainly because of its fire resistance
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monomers
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Small, repeating units that make up polymers
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Regenerated
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This category of fibers are derived from cellulose and produced by chemically modifying the natural polymers to create an entirely new compound not found in nature
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cellulose ester
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Regenerated fibers are made of this compound not found in nature
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rayon
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First man-made fiber; also the most common type of regenerated fiber
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acetate
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A less expensive, less polluting fiber alternative to rayon
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nylon
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The most durable, extremely light weight synthetic fiber; first introduced as artificial silk for pantyhose
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polyester
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The synthetic fiber used in polar fleece to provide warmth in the form of a lightweight, soft and resilient fabric
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acrylic
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The most widely used man-made fiber; inexpensive but tends to ball easily
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spandex
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A synthetic fiber known for its extreme elastic properties
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