Forensics Chapter 15: Fire Arms Vocab

Vocabulary Terms: Define each term within the context of this unit, on the images shown, label as many of the parts as possible by using the number or the name of the term:

Use the textbook and the following references to help you in your investigation of these terms. Some of these references will help you understand what happens during the firing of a handgun.

To start your investigation into Fire Arms, repeat Rookie Training at the CSI website: http://forensics.rice.edu/ and complete the “Firearms & Tool Marks” section for “Case One: Rookie Training” again. You can use this to help complete some of the vocab and/or to answer questions that follow.

http://library.med.utah.edu/WebPath/TUTORIAL/GUNS/GUNINTRO.html http://youtu.be/rJMXXuGhINE

http://homestudy.ihea.com/glossary_fa.htm http://www.tehamaccw.com/

http://simplyaboutguns.com/wp-content/uploads/2012/02/anatomy.png http://youtu.be/TXliIJ_66FQ

  1. Handgun
  2. Semi-Automatic
  3. Revolver
  4. Rifle
  5. Shotgun
  6. Single/double action
  7. Sights/front and back
  8. Frame
  9. Grip
  10. Trigger/Trigger Guard
  11. Barrel
  12. Slide
  13. Muzzle
  14. Bore
  15. Breech/Chamber
  16. Breechblock
  17. Hammer
  18. Firing Pin
  19. Ejector
  20. Extractor
  21. Magazine
  22. Clip
  23. Cylinder
  24. Twist
  25. Rifling
  26. Grooves
  27. Lands
  28. Ammunition
  29. Round
  30. Bullet
  31. Caliber
  32. Case or Casing
  33. Cartridge
  34. Rim
  35. Head Stamp
  36. Jacket (Full/Hollow Point)
  37. Primer
  38. Powder
  39. Shell
  40. Shot
  41. Gauge
  42. Wad
  43. Striations

Questions: USE APPROPRIATE VOCABULARY WHEN ANSWERING THE QUESTIONS.

  1. Describe all the steps that occur when a semi-automatic handgun is “fired” and the next round is loaded.
  1. Describe all the steps that occur when a revolver is “fired” and the next round is loaded.
  1. Markings on ammunition will occur when any metallic part of the round comes into contact with metallic parts of the weapon. Consider the process that each gun uses to fire a bullet and define the cause of each of the following types of markings and on what parts of the ammunition they might be found.
  1. Rifling Markings
  2. Striation Markings
  3. Firing Pin Markings
  4. Breechblock Markings
  5. Extractor Markings
  6. Ejector Markings
  1. Consider each type of handgun (revolver and semi-automatic) and identify markings that will be common for both, and markings that will not be common (present in one of the types but not the other. Complete the Venn diagram below to differentiate. Use the letters from Q3 above if necessary to help it fit.