1. Trace Evidence Jeopardy Test Review
Eleanor M. Savko
7/4/2018
Trace Evidence Jeopardy Test Review
Impressions
Glass & Soil
Fiber
Hair
Pollen & Paint
100 pt
100 pt
100 pt
100 pt
100 pt
200 pt
200 pt
200 pt
200 pt
200 pt
300 pt
300 pt
300 pt
300 pt
300 pt
400 pt
400 pt
400 pt
400 pt
400 pt
500 pt
500 pt
500 pt
500 pt
500 pt

2. 100 pts
Name the three types of impressions

3. Pattent, Latent, Plastic
Answer
Pattent, Latent, Plastic

4. 200 pts
When can impression evidence be used as individual evidence?

5. When it has unique features
Answer
When it has unique features

6. 300 pts
Name three class characteristics of shoe impressions

7. Shoe size, weight, activity, shoe type
Answer
Shoe size, weight, activity, shoe type

8. 400 pts
What are three general ways to preserve impression evidence?

9. Photographing, lifting, casting
Answer
Photographing, lifting, casting

10. 500 pts
What are the three types of tire impression evidence?

11. Answer Skid marks (braking suddenly)
Yaw marks (skid sideways in curved path)
Tire scrubs (during or after impact)

12. 100 pts
What is Georg Popp known for?

13. First to convict based on soil evidence
Answer
First to convict based on soil evidence

14. 200 pts
How is sand analyzed?

15. Answer
Texture
Shape
Grain size
Sorting

16. 300 pts
What is the mass of a glass sample if the density is 6 g/mL and it has a volume of 2 mL?

17. Answer
D=m/V
6 = m/2 so 2 * 6 = 12 grams

18. 400 pts
What is the Becke Line and what method of glass analysis is it associated with?

19. Answer
Becke line—a halo-like glow that appears around an object immersed in a liquid close to match point. Immersion method—lower fragments into liquids whose refractive index is different

20. 500 pts
Light traveling in air (n1=1) hits a piece of glass at an angle of 24 degrees. The glass has a refractive index of What is the angle of refraction?

21. Answer
1 sin (30) = 1.68 sin (?) .5 = 1.68 sin (?) .5/1.68 = sin (?) = sin (?) sin-1 (.2976) = ? Angle of refraction = 17.31⁰

22. 100 pts
What are the two categories of fibers?

23. Answer
Natural and Synthetic

24. 200 pts
What are the most common types of animal and plant fibers

25. Cotton – plant, Wool - animal
Answer
Cotton – plant, Wool - animal

26. 300 pts
What is the warp and the weft?

27. Answer
Warp – lengthwise threads in a textile
Weft – crosswise threads in a textile
Used to determine textile patterns

28. 400 pts
What percentage of fibers are lost in the first 24 hours and why?

29. Answer
95%, because fibers are so easily transferred according to Locard’s exchange principle

30. 500 pts
What is the difference between regenerated and synthetic fibers? Give an example of each.

31. Answer
Regenerated fibers are cellulose-based: Rayon
Synthetic fibers are petroleum-based: Acrylics, Polyesters, Nylons

32. 100 pts
What are the three layers of the hair shaft?

33. Cuticle, Cortex, Medulla
Answer
Cuticle, Cortex, Medulla

34. 200 pts
What are the three scale types of the cuticle. Give one example of a species common to each type?

35. Answer
Imbricate – Human
Coronal – Mouse
Spinous – Cat

36. 300 pts
What is the Medullary index? How can it be used to differentiate between animal and human hair?

37. Answer
Ration of Diameter of Medulla/Diameter of the Whole Hair
Human rations are small (<.3)
Animal rations are large (>.5)

38. 400 pts
What are the 5 types of medulla patterns?

39. Answer
Interrupted
Fragmented
Continuous
Solid
None

40. 500 pts
What is Neutron Activation Analysis? Are the results class or individual?

41. Answer
Hair is bombarded with neutrons and then the levels or gamma radiation are analyzed to determine the amount of 14 different elements
Antimony, argon, bromine, copper, gold, manganese, silver, sodium, zinc
Results are individual to 1 in 1,000,000 people.

42. 100 pts
What is palynology?

43. Answer
The study of pollen and spores

44. 200 pts
The outer shell of pollen is called the _________________

45. Answer
Exine

46. 300 pts
What is the difference between paint chips and paint smears? Describe the process of FTIR to analyze paint. Include one disadvantage.

47. Answer
Paint chips: Pieces of paint which have come off surface. They usually contain all of the layers of the paint
Paint smears: The top layer of paint which has loosened owing to being wet or air oxidation. Smears onto another surface after brushing contact. Layer structure is not present

48. 400 pts
Describe the process of FTIR to analyze paint. Include one disadvantage.

49. Answer Fourier transform infrared spectroscopy
Collects spectral data (absorption, emission, etc.)
Results of film former show as line graph
Does not show pigments unless they are organic
Is a bulk method: if more than one layer is present, IR will be a composite

50. 500 pts
What are the components of the male and female parts of angiosperms? What are the male and female parts called?

51. Answer
Male
Female
Stamen
Anther
Filamert
Pistil
Stigma
Style
Ovary

52. Final Jeopardy
What has more significant results? Neutron Activation Analysis or the following example. Among the student body (2,500): 200 people have red hair, 130 have fragmented medullas, 3 have coronal cuticle scales, 967 have treated hair, and 60 have a cortex diameter of 95μm. What is the probability of a person having red hair with a fragmented medulla, coronal cuticle scales, treated hair, and a 95μm cortex diameter.

53. Final Jeopardy Answer NAA is 1/1,000,000 = 1 x 10-6
Therefore, the hair example has the more significant results because the results are less likely to be found in another person.