Chapter 17 Questions # 1-15 (10 Points)

CHAPTER 17 QUESTIONS # 1-15 (10 POINTS)

M.C. #1-10 (0.5 pts each)

1. true

2. FALSE

3. FALSE

4. FALSE

5. true

6. B

7. B

8. A

9. A

10. A

Short Answer # 11-15 (1 pt each)

11. What kind of information can be learned from GSR?

How far away the shooter was or where the shooter was.

12. Describe how investigators match a bullet to a firearm.

Any reasonable answer should include inspecting the lands and grooves from the crime scene bullet and a ‘test fire’ from the suspected weapon.

13. Why are bullets fired into a gel tank in a forensics ballistics lab?

So the bullet will not be damaged

14. Compare and contrast an entry wound and an exit wound produced from a bullet.

ENTRY WOUNND is typically small and may contain GSR (Gun Shot Residue). EXIT WOUND is typically larger, messier, and has no GSR.

15. Using the following terms, explain how the different parts of a gun and cartridge enable the bullet to be fired from a gun:

Accept any reasonable answer…example

The trigger releases the hammer that hits the firing pin, which causes the explosion of the primer powder. This ignites the gunpowder. The energy released from the explosion forces the bullet through the barrel where the lands and grooves cause the bullet to spiral, and also become marked with the lands and grooves.

16. What is NIBIS and how is it used to help solve crimes (Did not assign, but if you did)

National Integrated Bullet Identification System. It stores markings made by known firearms to check for matches similar to a computer fingerprint matching database.