You will need to copy and paste these questions into a Word document and type in the answers. Use as much space as you need, and please do not put one sentence answers. Make sure you fully answer the question and answer ALL parts of the question. PLEASE INCLUDE BOTH THE QUESTION AND THE ANSWER IN YOUR ASSIGNMENT. Please use the attached Ch 9,and 10 powerpoints and you tube video provided below . Please no plagiarism, no a i no chat bots

Chapter 9 Firearms, Toolmarks and Other Impressions

Chapter 10: Matter, Light and Glass

1. List TWO reasons why striations on bullets fired from the same gun may vary slightly.
2. Besides the barrel, what parts of a firearm may leave distinct markings on a shell cartridge?
3. What evidence does an investigator study to make a distance determination? How can test firing a suspect weapon help the investigator make a distance determination?
4. List THREE characteristics of a bullet hole that indicate that the shot was fired at extremely close range.
5. What evidence do investigators look for when trying to determine whether a suspect has fired a handgun? Where is such evidence typically found and why?
6. Why would an investigator not pick up a weapon by its barrel with a pencil or stick in order to protect latent fingerprints? How should suspect firearms be handled in such a situation?
7. Name two types of markings that impart individuality to a tool and explain how the marks are made.
8. What kinds of impressions might a forensic odontologist be asked to analyze? How might this help identify a suspect?
9. What is the first thing the investigator does before handling or moving any impression at a crime scene? Why is this considered merely a backup or precautionary procedure?
10. Define the terms refraction and refractive index.
11. What is the Becke line and how is it used to determine the refractive index of a glass sample?
12. What is the 3R Rule and how is it applied to the analysis of glass fractures?
13. What is density? How does heat affect the density of gases and liquids?
14. How can investigators determine the order in which several successive penetrations of a glass occurred?
15. List two factors that make is difficult for criminalists to compare glass samples.

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