function and structure of a firearm forensics

Why was rifling added to the barrels of guns?

• To make bullets shoot straighter
• To make bullets traceable at crime scenes
• To make bullets go faster
• To cause bullets to separate from the cartridge

What is the best description of caliber?

• The length of the cartridge
• The diameter of the bullet
• The length of the bullet
• The diameter of the cartridge

What is #2 pointing to?

• Primer
• Firing Pin
• Flash Hole
• Gun Powder

What is #4 pointing to?

• Cartridge Case
• Firing Pin
• Bullet
• Gun Powder

What caused the bullet to move from the chamber into the barrel?

• Pressure from the expanding gun powder
• Firing pin pushes it down the barrel
• The trigger manually moves the bullet into the barrel
• Pressure from the ignited primer powder

Tags

NGSS.HS-PS2-1

Why is rifling important for forensic ballistic analysis?

• It spins the bullet, making it more accurate.

• It makes the bullet travel farther before losing accuracy/

• It can be found in all firearms.

• It makes indentations on the bullet that are unique to the firearm.

Place the steps of a firearm in order from beginning to end

1) The pressure of the ignition pushes the bullet from the casing and into the barrel of the firearm

2) The bullet follows the lands and groves pattern of the barrel and spirals out of the barrel

3) The trigger is pulled and firing pin from the firearm hits the base of the cartridge, igniting the powder inside the bullet

• 1,2,3

• 3,2,1

• 2,1,3

• 3,1,2

Tags

NGSS.HS-PS2-1

Which term accurately describes the part of the gun labeled F

• Gun Barrel

• Trigger Guard

• Action

• Trigger

How are automatic weapons distinguishable from semi-automatic weapons?

• Automatic Weapons fire repeatedly as long as trigger is pressed, while semiautomatic weapons fire one bullet per pull of the trigger

• Semi-automatic Weapons fire repeatedly as long as trigger is pressed, while automatic weapons fire oen bullet per pull of the trigger

• Both semi-automatic and automatic weapons fire repeatedly as long as the trigger is pressed

• Both semi-automatic and automatic weapons only fire one bullet per pull of the trigger

Ballistics can match a bullet to the gun that fired it.

• True

• False