Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition.
The flame is the visible portion of the fire. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.
Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems across the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Fire has been used by humans for cooking, generating heat, signaling, and propulsion purposes. The negative effects of fire include water contamination, soil erosion, atmospheric pollution and hazard to human and animal life.
Famous quotes containing the word fire:
“And all shall be well and
All manner of thing shall be well
When the tongues of flame are in-folded
Into the crowned knot of fire
And the fire and the rose are one.”
—T.S. (Thomas Stearns)
“The most stringent protection of free speech would not protect a man in falsely shouting fire in a theater and causing a panic.”
—Oliver Wendell Holmes, Jr. (18411935)
“It isnt necessary to imagine the world ending in fire or icethere are two other possibilities: one is paperwork, and the other is nostalgia.”
—Frank Zappa (19401993)