Define combustion as a chemical reaction requiring oxygen, heat, and fuel, introducing the concept of ignition temperature.
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Visual equation of magnesium burning.
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Hook on starting a fire with a magnifying glass.
Have you ever held a magnifying glass over a piece of paper on a bright, sunny day? By angling it just right, the sunlight focuses into a tiny, intensely bright dot on the paper.
Within seconds, the paper starts to emit smoke, and suddenly—it catches fire! There was no match, no lighter, and no spark involved. So how exactly can a fire start without a flame?
Definition of combustion and combustible substances.
The science behind burning is a process called combustion. It is a chemical reaction in which a substance reacts with oxygen to produce heat and, often, light.
Materials that can easily undergo this process—like wood, paper, cotton, or kerosene—are known as combustible substances, or simply fuel.
Hook about extinguishing fires with blankets.
Explanation of the Fire Triangle and ignition temperature.
For combustion to take place, three specific conditions must be met at the exact same time. These three elements form what is known as the Fire Triangle:
Infographic showing Fuel, Oxygen, and Heat.
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Fill in the components required for combustion.
Combustion is a chemical reaction that requires three specific conditions to occur simultaneously. First, you need a combustible substance, which is commonly referred to as . Second, the reaction must have a continuous supply of from the surrounding air to keep it burning. Finally, there must be enough applied to the substance to start the reaction. This energy raises the temperature of the material until it successfully reaches its temperature. If any one of these three elements is removed, the fire will instantly go out.