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Fire and Explosions
Fire and Explosions
23
Science
11th Grade
12/06/2012

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Cards

Term
What is pressure exerted in terms of blast pressure?
Definition
Pressure that is pushed away from the center
Term
What is a partial vacuum in terms of blast pressure?
Definition
Its when the airs sucks in towards the center of the explosions, usually occurs after the pressure is exerted
Term
What is the difference in terms of use between high and low explosives?
Definition
Low explosives are used to propell, while high explosives are used to destroy
Term
What is the fire tetrahedron?(what is in it?)
Definition
Heat, Oxygen, Fuel, Chain Reaction
Term
What is the term used to describe the input of energy in a fire?
Definition
Activation Energy
Term
What is a reaction called if it needs input of energy?
Definition
Endothermic
Term
What is a chemical reaction that releases energy?
Definition
Exothermic
Term
Combustion
Definition
The reaction of a fuel with oxygen
Term
What two things determine whether combustion results in fire or explosion?
Definition
1. Nature of Fuel
2. how close the oxygen and the fuel are to each other
Term
Flash Point
Definition
The lowest temperature that will allow a liquid to produce a flammable vapor
Term
Ignition temperature
Definition
The minimum temp to which a substance must be heated before it will sustain a burn
Term
Why does smoke occur?
Definition
Smoke occurs when there is incomplete combustion usually from lack of oxygen
Term
What is smoke made of?
Definition
carbon particles and unburned and partially burned gasses
Term
Flashback
Definition
fire burns with limited oxygen than is suddenly ventilated and explodes
Term
Accelerant
Definition
a substance that speed up the burning of a fire
Term
From a forensics standpoint name three types of fires
Definition
Natural, Deliberate, Accidental
Term
Why is the Point of Origin important?
Definition
The point where the fire starts because it has the most evidence of how the fire started.
Term
Why are V-Patterns Important?
Definition
They can generally show whether the fire was intentional or accidental.
Term
Heat Shadows
Definition
Th white space left when a heavy piece of material or furniture is blocking the wall in a fire.
Term
Chimney Effect
Definition
The fires central point where it becomes extremely hot and can burn a hole in the ceiling
Term
Color of smoke determines what?
Definition
The type of material burning
Term
What does the color of the fire determine?
Definition
the temperature at which fire burns.
Term
Arson
Definition
The intentional burning of someone elses property
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