✏️⭐💡Notes: Firearms Examination

Multiple Choice

Which of the following best describes the primary use of a comparison microscope in firearms examination?

• To measure the weight of bullets

• To compare markings on bullets or casings

• To determine the chemical composition of gunpowder

• To identify the manufacturer of firearms

Open Ended

Why is it important to distinguish between class characteristics and individual characteristics when examining bullets and cartridge casings?

Multiple Choice

Which of the following is NOT a class characteristic of bullets?

• Caliber (bullet diameter)

• Number of lands and grooves

• Direction of rifling twist

• Firing pin impressions

Multiple Select

Which features are considered class characteristics of cartridge casings?

• Caliber or gauge

• Firing pin shape

• Extractor and ejector design

• Breech face marks

Multiple Choice

What evidence can be linked to a single firearm based on individual characteristics?

• Unique marks from wear or damage

• Caliber of bullet

• Number of lands and grooves

• Extractor and ejector design

Open Ended

Explain the difference between class characteristics and individual characteristics in firearm identification.

Fill in the Blank

Individual characteristics on bullets appear as fine parallel lines called ___.

Open Ended

Describe how individual characteristics on casings are used in forensic investigations.

Multiple Choice

Which of the following is a primary use of a comparison microscope in forensic science?

• To allow side-by-side comparison of evidence

• To magnify biological samples for medical diagnosis

• To analyze chemical compositions of substances

• To photograph crime scenes

Open Ended

How do you think the use of a comparison microscope enhances the examination of bullets and cartridge casings?

Multiple Choice

What are the main learning goals for the topic of firearms examination?

• To identify class and individual characteristics of bullets and casings, and to explain the use of a comparison microscope.

• To describe the history of firearms only.

• To list types of ammunition without analysis.

• To explain only the manufacturing process of bullets.

Open Ended

Explain how the use of a comparison microscope can impact the outcome of a criminal investigation, referencing its role in linking suspects to crime scenes and providing courtroom evidence.