Forensic Science - Ironwoodwilson



Forensic Science Name:___________________________

Soils Glass, Handwriting Final Review II Pd:_____ Date:_________________

Word Bank:

physical, microscopic, chemical terminate larger side sand

refractive index evidence less than humus

not a physical property amorphous particle size density

compare glass samples is equal to soil horizon glass

forensic definition of soil radial lines geographic features

1. The __________________________________________________is a mixture of mineral grains, organic matter, and any other materials mixed in with the sample such as glass, metals, paint, etc…

2. Soil evidence is analyzed based on its ________________________ properties such as density, color, _______________________structure, ___________________ properties such as pH and its settling rate.

3. _____________________is defined as mass per unit volume

4. A topographic map in one that shows _____________________________________________of an area.

5. A ________________________________is something that shows a soil profile showing distinct layers

6. The organic part of soil is called ______________________.

7. ______________________________ is not very useful as soil evidence because it doesn't cling or stick to clothing, shoes, or other objects very well.

8. The difference between clay and sand is ___________________________________

9. In the Coors kidnapping case, key _________________ was found on the remains of the kidnapper's car .

10. __________________________evidence is considered sometimes individual, sometimes class depending on the circumstances

11. The evolution (formation) of bubbles when another substance is added is _________________________ _______________ of a material or substance because it signifies the formation of a gas – which would be a chemical reaction.

12. A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment floats on the surface, the density of the glass is ______________________________the density of the liquid.

13. A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment is suspended in the middle of the liquid, the density of the fragment _______________________ the density of the liquid.

14. The ______________________________of a glass fragment is a physical property of the glass regardless of its size and can be determined making the fragment disappear in a liquid of known refractive index.

15. A piece of glass has a bullet hole that is larger on one side of the glass than on the other. This indicates a high powered shot gun made the hole and the _____________________________ is the exit.

16. In examining a glass fracture pattern, the __________________________ are cracks that extend out from the point of impact.

17. If two fracture lines meet, it is easy to determine which fracture occurred first because the fracture line will ______________________________ at the crack that happened first.

18. Glass is considered to be an _____________________________ solid.

19. Techniques frequently used to ______________________________________________are the use of density gradient tubes, floatation and use of the Becke line.

For # 20 only: Circle which response is correct:

20. A man claims that someone broke into his house through the window, the investigator believes that the window was broken from the inside of the house. What evidence would lead the investigator to believe this? a or b

a. the edge of the window had stress marks perpendicular to the outside and parallel to the inside.

b. the edge of the window had stress marks parallel to the outside and perpendicular to the inside.

Word Bank:

class evidence Becke line chemicals, metals enough samples

transmit light types of light sources silica, SiO2 conchoidal

21. It is useful to find the _______________________ (white line inside or outside margin) when examining refractive index.

22. Glass is found in nature as sand and heated to form glass with __________________________added to change its properties and with __________________________ added for color.

23. Soil evidence is considered _________________________________________.

24. Refractive index is a physical property of all materials that______________________________. 

25. Glass is primarily made of _______________or _______________.

26. Glass exhibits __________________ fracture.

Handwriting Analysis, Forgery Word Bank:

watermark characterizing paper paper chromatography fire charred mid-range close-up

UV and infrared simulated forgery obliterations diacritics disguise blind forgery positive match color shifting ink Secret Service flash fill visible overview

US currency questioned samples individual evidence transitory delete photos three

Alphonse Bertillon infrared reflected technical specifications Infrared luminescence

1. In order to make a ___________________________________between an unknown sample and an exemplar, an examiner has to both enough samples of the known writing, and a recent sample of the known writing.

2. A person can _________________his or her own handwriting simply by changing from printing to cursive, or changing from the natural writing hand to the other.

3. Placement of ________________________ is examining crossing of t's and dotting of i's.

4. A ______________________________of a signature is made without a model of the original signature.

5. A ______________________________ of a signature is made by copying a genuine signature.

6. ___________________________are words on a document that have been removed by physical or chemical means.

7. Alternative types of light sources such as _________________________________may be used to view different types of inks as well as erasures and writing on charred documents.

8. Paper sometimes will have a ________________________ to identify the manufacturer. A watermark is a design incorporated during the manufacturing process by reducing the number of fibers within a certain patterned area.

9. In ___________________________ samples, a forensic scientist uses density, the raw material the paper is made from, color, and fluorescence.

10. A good way to analyze water based inks is the use of _______________________________________.

11. ________________________is printed on cotton and linen fibers with red and blue threads embedded throughout.

12. __________________________________ was added to US currency to help thwart counterfeiters. This ink is found on the numeral in the lower right front of a bill, and changes from gold to black when viewed from the side.

13. The US agency that is responsible for suppressing counterfeiting is the ________________________________.

14. A document examiner would have difficulty identifying handwriting if the examiner did not have enough __________________________________.

15. Handwriting analysis is considered ___________________________if many samples are compared and analyzed by an expert.

Answers: ( Study, Study, Study,

physical, microscopic, chemical terminate larger side sand

refractive index evidence less than humus

not a physical property amorphous particle size density

compare glass samples is equal to soil horizon glass

forensic definition of soil radial lines geographic features

1. The ______ forensic definition of soil________is a mixture of mineral grains, organic matter, and any other materials mixed in with the sample such as glass, metals, paint, etc…

2. Soil evidence is analyzed based on its ______physical____ properties such as density, color, __microscopic_____structure, __chemical___ properties such as pH and its settling rate.

3. ___Density___is defined as mass per unit volume

4. A topographic map in one that shows ______ geographic features _______of an area.

5. A ____ soil horizon ________is something that shows a soil profile showing distinct layers

6. The organic part of soil is called ___humus____.

7. _________Sand_____ is not very useful as soil evidence because it doesn't cling or stick to clothing, shoes, or other objects very well.

8. The difference between clay and sand is ___particle size____

9. In the Coors kidnapping case, key __evidence_ was found on the remains of the kidnapper's car .

10. ___Glass____evidence is considered sometimes individual, sometimes class depending on the circumstances

11. The evolution (formation) of bubbles when another substance is added is __not a physical____ __property__ of a material or substance because it signifies the formation of a gas – which would be a chemical reaction.

12. A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment floats on the surface, the density of the glass is __less than_____the density of the liquid.

13. A glass fragment is dropped into a test tube filled with a particular liquid. If the fragment is suspended in the middle of the liquid, the density of the fragment __is equal to________ the density of the liquid.

14. The ___refractive index________of a glass fragment is a physical property of the glass regardless of its size and can be determined making the fragment disappear in a liquid of known refractive index.

15. A piece of glass has a bullet hole that is larger on one side of the glass than on the other. This indicates a high powered shot gun made the hole and the ____larger side______ is the exit.

16. In examining a glass fracture pattern, the ___radial lines_________ are cracks that extend out from the point of impact.

17. If two fracture lines meet, it is easy to determine which fracture occurred first because the fracture line will ___terminate_________ at the crack that happened first.

18. Glass is considered to be an ___amorphous_______ solid.

19. Techniques frequently used to ___compare glass samples______are the use of density gradient tubes, floatation and use of the Becke line.

For # 20 only: Circle which response is correct:

20. A man claims that someone broke into his house through the window, the investigator believes that the window was broken from the inside of the house. What evidence would lead the investigator to believe this? a or b

a. the edge of the window had stress marks perpendicular to the outside and parallel to the inside.

b. the edge of the window had stress marks parallel to the outside and perpendicular to the inside.

Word Bank:

color shifting ink individual evidence transmit light silica, SiO2 .

blind forgery simulated forgery characterizing paper red and blue

diacritics obliterations watermark class evidence

Becke line chemicals, metals enough samples disguise

types of light sources paper chromatography identifying handwriting Secret Service

21. It is useful to find the __ Becke line ___ (white line inside or outside margin) when examining refractive index.

22. Glass is found in nature as sand and heated to form glass with ___chemicals____added to change its properties and with _____ metals _________ added for color.

23. In order to make a positive match between an unknown sample and an exemplar, an examiner has to

have __ enough samples ______of the known writing and have a recent sample of the known writing.

24. A person can ____ disguise _____his or her own handwriting by changing from printing to cursive as well as by changing from the natural writing hand to the other.

25. Placement of __ diacritics __is examining the crossing of t's and dotting of i's.

26. A ___ blind forgery ___of a signature is made without a model of the original signature.

27. A ____ simulated forgery _____of a signature is made by copying a genuine signature.

28. ___ obliterations ______ are words on a document that have been removed by physical or chemical means.

29. Alternative ____ types of light sources _______ such as UV and infrared may be used to view different types of inks, erasures and writing on charred documents.

30. A ____ watermark ______ is a design incorporated during the manufacturing process by reducing the number of fibers within a certain patterned area.

31. In____ characterizing paper ____ samples, a forensic scientist may use the following: density, the raw material, the paper is made from, color and fluorescence

32. A good way to analyze water based inks is the use of___ paper chromatography ____________.

33. US currency is printed on paper with ______ red and blue _________ threads embedded throughout.

34. ___color shifting ink ______was added to US currency to help thwart counterfeiters. It is found on the numeral in the lower right front of a bill and changes to black when viewed from the side.

35. The US agency that is responsible for suppressing counterfeiting is the ___Secret Service______.

36. A document examiner would have difficulty ___identifying handwriting _______if he did not have enough questioned samples.

37. Soil evidence is considered _______class evidence__________________.

38. Handwriting analysis is considered ____ individual evidence _________if analyzed by an expert.

39. Refractive index is a physical property of all materials that____ transmit light _________. 

40. Glass is primarily made of ____ silica, SiO2 ________

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