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1. fire is one __ the four classical elements __ ancient greek philosophy and science that was commonly associated __ the qualities __ energy, assertiveness, and passion.


2. a fire __ any time and __ any location, requires three basic elements: combustible fuel, oxygen to combine __ the fuel __ combustion and the source __ ignition.


3. fire is used __ nearly every human being __ earth __ a controlled setting every day.


4. substances decompose __ the influence __ heat __ different temperatures.


5. the rate __ combustion depends __ the character __ materials involved __ the process.


6. when there is sufficient air __ the room it can burst __ flames if any source __ ignition is present there.


7. if you remove any component __ the fire triangle it will lead __ the collapse __ and the combustion will cease.


8. there are a lot __ factors which influence __ the behavior __ a fire.


9. fire safety refers __ precautions that are taken to prevent or reduce the likelihood __ a fire that may result __ death, injury, or property damage.


10. a backdraft is an explosive event __ a fire resulting __ rapid re-introduction __ oxygen __ combustion, __ example, the breaking __ a window or opening __ a door __ an enclosed space. backdrafts present a serious threat __ firefighters, even those __ a high level __ experience.