Fire Triangle - shows the three elements needed to produce and sustain a fire, Point of origin - the location where the fire started, Burn Patterns - noticeable patterns created by the burns, Accelerants - substances that accelerate the burning process, Arson - a deliberate fire, Heat - amount of energy necessary to increase temp of fuel to a point where it can ignite, Fuel - any combustible material in any state of matter, Oxygen - needs about 16 percent to burn, Char Patterns - created by hot fires that burn very quickly and move fast along its path, V-Pattern - fire burns up in a v-shaped pattern so a fire that starts at an outlet against a wall leaves a chair pattern that points to the origin, Heat Shadows - occur when heavy furniture shields part of a wall, Chimney Effect - fire ignites at a point, superheated gases rise up and form a fireball, Flames - color determines temperature, Combustion - rapid combo of oxygen with another substance, produces heat and light, Pyrolysis - decomposition of solid organic matter by heat, Glowing Combustion - smoldering not enough heat to pyrolize, 3 Mechanics of heat transfer - Conduction, radiation, convection, Conduction - Movement of heat through solid object, Radiation - Transfer of heat energy by electromagnetic radiation, Convection - Transfer of heat energy by the movement of molecules with in a liquid or gas, Examples of fuel - Clothing, furniture, curtains, flammable liquids, Examples of heat - Stoves, heating appliances, fire places, damaged wiring, A Narrow V shape - May indicate a hotter than normal fire, accelerant may have been used, A Wide V shape - May indicate a fire that was slow burning, U shaped - Makes it more difficult to find the point of origin; may also indicate that there was a "pool of origin",

Arson Vocab

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