8858848657 | Synthetic fiber | Fibers that have been tampered with chemically | 0 | |
8858848658 | Fibers | Common trace evidence at a crime scene, made up of twisted filaments | 1 | |
8858848659 | Natural Fibers | Animal, vegetable or inorganic fibers | 2 | |
8858848660 | List of artificial fibers | Rayon Nylon Acetate Spandex Acrylic Polyester | 3 | |
8858848661 | List of natural fibers | Cotton Wool Silk Mohair Cashmere | 4 | |
8858848662 | What was the first truly synthetic fiber to be discovered and sold? | Nylon | 5 | |
8858848663 | Monomers | Repeating units of a polymer | 6 | |
8858848664 | Tests for identification | 1. microscopic observation 2. burn test 3. thermal decomposition 4. chemical tests 5. density 6. refractive index 7. fluorescence | 7 | |
8858848665 | Fabric | A cloth material made up of fibers woven or bonded together in a distinctive manner | 8 | |
8858848666 | What is an electropherogram? | Plot of results from an analysis done by electrophoresis. | 9 | |
8858848667 | A gray cotton fiber was found on the red sweater of a victim. A gray cotton fiber was taken from a suspect's sweatshirt. After testing 900 gray sweatshirts, the lab found the fiber matches 45 of them. What is the probability that the crime scene fiber and that of the suspect matched simply by chance? | 45/900 = 1/20 (0.05) | 10 | |
8858848668 | What are the most common items left at the crime scene? | Hair and fiber. | 11 | |
8858848669 | List at least four examples of synthetic fibers | Nylon, polyester, acrylic, plastic | 12 | |
8858848670 | Is linen a natural or synthetic fiber? | Natural | 13 | |
8858848671 | What is a polymer? | A molecule consisting of many repeating units. Can be naturally occurring or synthetic . | 14 | |
8858848672 | List at least four examples of natural fibers. | Cotton, wool, linen, silk | 15 | |
8858848673 | What types of tests are used to test the dye in a particular fiber? | Chemical tests or chromatography | 16 | |
8858848674 | The Amanda Davies case showed the importance of what? | Fiber transfer | 17 | |
8858848675 | Which fiber will fluoresce under ultraviolet light? | Cotton | 18 | |
8858848676 | Who was the first person convicted on the basis of fiber evidence? | Wayne Williams | 19 | |
8858848677 | Which of the following properties should be examined when comparing two fibers? | Diameter | 20 | |
8858848678 | What does wool smell like when it is burned? | Burning hair | 21 | |
8858848679 | Becke line | A halo-like shadow around an object immersed in a liquid of a different refractive index. | 22 | |
8858848680 | Blend | A fabric composed of two or more different types of fiber. | 23 | |
8858848681 | Chromatography | A method of separating components of mixtures. | 24 | |
8858848682 | Plain | Simplest and most common weave. | 25 | |
8858848683 | Density | Mass divided by volume. | 26 | |
8858848684 | Elute | To extract one material from another. | 27 | |
8858848685 | Filament | A single strand of material. | 28 | |
8858848686 | Satin | A diagonal weave pattern, denim is an example. | 29 | |
8858848687 | Viscosity | The resistance of liquid. | 30 | |
8858848688 | Weft | The crosswise yarn | 31 | |
8858848689 | Warp | The lengthwise yarn. | 32 | |
8858848690 | Fibers are considered what? | Class evidence | 33 | |
8858848691 | Nylon was developed when? | 1939 | 34 | |
8858848692 | 1911 | Rayon | 35 | |
8858848693 | 1920s | Cellulose and Acetate | 36 |
Forensic Science Chapter 6: Fibers Flashcards
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