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Unit 6

QuestionAnswer
Rifling the spiral grooves formed in the bore of a firearm barrel that impart spin to the projectile when it is fired
Bore the interior diameter of a gun barrel.
Lands the raised areas between two grooves in the rifling of a gun barrel that impart grooves on the bullet.
Grooves the cut or low-lying portions between the lands in a rifled bore.
Ejector the mechanism in a firearm that throws the cartridge or fired case from the firearm.
Extractor the mechanism in a firearm by which a cartridge of a fired case is withdrawn from the chamber.
Gunshot Residue soot and particles of unburned gunpowder deposited on a person who discharges a firearm; may also be found on close-range victims and adjacent surfaces.
Breechblock a metal block that closes the aperture at the back part of a rifle or gun barrel.
Striations fine scratches left on bullets, formed from contact of the bullet with imperfections inside the gun barrel.
Barrel the long, metal tube that guides a projectile out of a firearm.
Shot Shell metal shot and explosives shot from a cannon or shot gun.
Cartridge a case that holds a bullet, primer powder, and gunpowder.
Caliber diameter of a tube or gun barrel.
Gauge diameter of a shotgun barrel
Tool Mark any impression, cut, gouge, or abrasion caused by a tool coming into contact with another object.
Impression Evidence includes toolmarks, tire tracks, shoe prints, and bite marks.
Accelerant any material used to start or sustain a fire.
Combustion rapid reaction between oxygen and fuel that results in fire
Detonation Action of causing a bomb or explosive device to explode
Endothermic Reaction chemical reaction that requires heat
Explosion sudden and violent outbreak.
Energy ability to do work or cause change
Exothermic Reaction chemical reaction that releases energy to its surroundings
Flash Point the minimum temperature at which a liquid fuel produces enough vapor to burn
Heat of Combustion the heat liberated during combustion
High Explosive an explosive with a velocity of detonation greater than 1,000 meters per second
Hydrocarbon compounds composed of only carbon and hydrogen
Low Explosive an explosive with a velocity of detonation less than 1,000 meters per second
Ignition Temperature the minimum temperature at which a fuel spontaneously ignites
Modus Operandi (MO) the characteristic method of operation of a criminal; sometimes referred to as MO.
Oxidation chemical reaction of a substance (fuel) combining with an oxidizer to release energy in the form of heat or light
Oxidizing Agent speed up the development of a fire and make it more intense.
Primary Explosive a high explosive that is easily detonated by heat, shock, or friction
Pyrolisis the decomposition of solid organic matter by heat
Safety Fuse a cord containing a core of black powder, used to carry a flame at a uniform rate to an explosive charge
Secondary Explosive a high explosive that is relatively insensitive to heat, shock, or friction
Spontaneous Combustion self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, auto-ignition.
Flash Point the minimum temperature at which a liquid fuel will produce enough vapor to burn
Glowing Combustion or smoldering; fuel burning without the presence of a flame ex: red hot charcoal or burning cigarette
Ignition Temperature the minimum temperature at which a fuel will spontaneously ignite
Created by: dnaijahd
 

 



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