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Arson Notes, Arson Notes
Terms in this set (30)
Causes of Fires
1. Natural (lightning)
The combustion of oxygen with other substances to produce new substances
Rapid combo of oxygen with another substance accompanied by the production of noticeable heat and light
Heat of Combustion
Heat evolved when a substance is burned in oxygen
min. temperature at which liquid fuel will provide enough vapor to burn
decomposition of organic matter by heat
entire range of possible gas or vapor fuel concentration in the air that are capable of burning
Requirements for a fire
fuel, heat, oxygen (don't always need oxygen)
Methods of Heat Production
1. Chemical (rapid oxidation)
2. Mechanical (friction)
3. Electrical (arcing, shorting)
any material used to start or sustain a fire
(the fuel of the fire)
What is the most common accelerant and why?
Gasoline; readily available, inexpensive; can obtain a large quantity without causing suspicion
Luckily, not all of the ___________ usually _________
Searching for accelerants...
-leakage through cracks in the floor
-carpet, rags, and upholstery can have unburned accelerant
a sensitive portable vapor detector; sucks in the surrounding air and detects combustible vapors
Fire moves ___________
Origin located closest to _______ _______ of ________ ________ ________
most intense burning
A __________ pattern forms against a ___________ _________
Flammable liquids flow ________
More sever burning on the floor than on the ceiling usually indicates the presence of ____________________
Deviations of fire from the norm
-drafts and winds
-secondary fires (due to collapsing floors and roofs)
-stairways, holes, elevator shafts
Sudden buildup of gas pressure that constitutes the nature of an explosion. The speed at which explosives decompose permits their classification as high or low explosives.
Mixtures of chemicals that burn very rapidly but subsonically, meaning they deflagrate. Must be confined.
Consist of materials that typically combine the reacting elements in the same molecule which allows them to react faster and they detonate.
An explosive material based on nitroglycerin, Dynamite was invented by the Swedish chemist Alfred Nobel 1867. Dynamite is usually sold in the form of sticks. Dynamite is a high explosive, which means it detonates rather than deflagrates. While trinitrotoluene (TNT) is used as the standard for gauging explosive power, dynamite has more than a 60% greater energy density than TNT.
Oklahoma City Bombing
Bombing of Murrah Federal Building. The blast, set off by Timothy McVeigh and Terry Nichols, killed 168 people, including 19 children in the building's day-care center. 1995
Twin World Trade Center 1993 & 2001
3000 dead after 9-11.
US Embassy barracks 1983
In 2000, two suicide bombers in a small rubber boat nearly sank a billion dollar warship docked in Yemen, the USS Cole.
Pan Am Flight Lockerbie, Scotland
N.Y.-bound Pan-Am Boeing 747 exploded in flight from a terrorist bomb and crashed into Scottish village, killing all 259 aboard and 11 on the ground.
History of Nuclear Bombs
The atomic bomb was first developed by German and American scientists including Einstein. The first two fission bombs were used by the USA on Japan to end WWII. These are the only 2 ever used during war on an enemy. Over 2000 have been exploded in testing. The damage from nuclear bombs would be much greater than chemical bombs.
THIS SET IS OFTEN IN FOLDERS WITH...
Intro to Forensic Science Vocab
Bones of the Body
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