Internal Ballistics
External Ballistics
Terminal Ballistics
Arson
Wild Card
100
What is internal ballistics?
The study of the processes occurring inside a firearm when a bullet is fired
100
What is external ballistics?
The study of the projectile's flight from the time it leaves the barrel until it hits its target
100
What is terminal ballistics?
The study of how a projectile behaves when it hits its target and transfers its energy to the target
100
A substance used to start or speed up a fire is known as a/an
a) point of origin
b) chemical
c) accelerant
d) extinguisher
c) accelerant
100
What is the point of origin AND how do investigators locate it?
The location where the fire started. V shape pattern points towards origin.
200
The caliber of a bullet is related to its ___________.
diameter
200
What is meant by the term trajectory?
The path that the bullet takes when it exits the barrel.
200
In which of the following pictures do you think the gun was farthest away from the victim?
200
The burning of an unoccupied building in order to claim insurance on the property is known as ___________ degree arson.
a) 1st
b) 2nd
c) 3rd
d) 4th
b) 2nd degree arson
200
Describe third degree arson
Burning an abandoned building or an abandoned area, such as field, forest, or woods.
300
Which of the following is not part of a cartridge?
a) barrel
b) bullet
c) gunpowder
d) primer powder
a) barrel
300
What is GSR?
Gunshot Residue
300
What physically happens to most bullets (hollow point) when they hit their target?
They mushroom / fold over on themselves
300
Describe first degree arson.
Burning an occupied structure (school) or place where people are normally present
300
Shooter was above victim firing down and was far away from victim
400
A handgun with bullet cartridges in a cylinder that rotates with each pull of the
trigger is known as a _____________.
Revolver
400
On what portions of a shooter’s hands are powder and primer residues most likely to be deposited just after a weapon is fired?
Palms and first three fingers
400
Identify the 4 types/ranges of bullet wounds.
- contact gunshot wounds
- close range gunshot wounds
- intermediate range gunshot wounds
- distant gunshot wounds
400
How can light bulbs aid an arson investigation?
Light bulbs will melt/bend towards the heat source and reveal the point of origin
400
Which type of bullet causes the most internal damage?
Hollow point
500
What is a rifling pattern and what is its purpose?
The lands and grooves inside a barrel cause the bullet to spin as it leaves the gun, which improves the bullet's accuracy
500
Write the equation for bullet trajectory if you only know the distance and the angle.
tan(angle)= opposite / adjacent
(distance) tan (angle) = trajectory path
500
Name 3 of the 5 factors that determine the seriousness of a gunshot wound?
- speed of the bullet
- distance from the shooter
- type of tissue involved
- path of the bullet
- type of bullet
500
Name the 3 requirements needed to start a fire.
Oxygen
Fuel
Heat
500
What is another name for Terminal ballistics?
Wound Ballistics