What is it called when a substance remains
chemically the same but changes changes in What are the two modes of combustion? -
size, shape, or appearance? - ANSWER - ANSWER -flaming and non-flaming
Physical change
What model illustrates the three necessary
What are two examples of physical change? - elements for fire to occur? - ANSWER -Fire
ANSWER -Water boiling and water freezing triangle (heat, oxygen, fuel)
What is it called when a substance changes from Heat from a fire is a danger to anyone directly
one type of matter into another such as two or exposed to it however, what causes the majority
more substances combining to form compounds? of fire deaths? - ANSWER -toxic smoke
- ANSWER -chemical reaction
Smoke is an aerosol, what is it comprised of? -
What represents the amount of kinetic energy ANSWER -gases, vapors, and particulates
that an object can release at some point in the
future? - ANSWER -Potential energy
What is the toxic, flammable product of the
incomplete combustion of organic materials? -
What is the energy possessed by a moving ANSWER -Carbon monoxide
object referred to as? - ANSWER -kinetic
energy
What did the study conducted by the Phoenix
Fire Department determine? - ANSWER -
In terms of fire behavior, what happens to the Hazardous concentrations above published
potential chemical energy of a fuel? - short-term exposure limits are likely to be present
ANSWER -It is converted to thermal energy during overhaul
and released as heat
What is it called when a chemical reaction
What is the measure of energy in SI units? - increases the temperature of a material without
ANSWER -joules the addition of external heat? - ANSWER -
Self-heating
What are the two forms of ignition? -
ANSWER -piloted ignition and autoignition What is the most common source of heat in
combustion reactions? - ANSWER -
chemical energy
What is a major difference between fire and
combustion? - ANSWER -combustion is a
chemical reaction and fire is one possible result What does the oxidation process almost always
of combustion result in? - ANSWER -production of thermal
energy
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