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.
Read more about Fire: Fire Ecology, Fossil Record, Human Control, Protection and Prevention, Restoration
Famous quotes containing the word fire:
“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. (1841–1935)
“This Indian camp was a slight, patched-up affair, which had stood there several weeks, built shed-fashion, open to the fire on the west.... Altogether it was about as savage a sight as was ever witnessed, and I was carried back at once three hundred years.”
—Henry David Thoreau (1817–1862)
“Rumble thy bellyful! Spit, fire! Spout, rain!
Nor rain, wind, thunder, fire are my daughters.
I tax you not, you elements, with unkindness;
I never gave you kingdom, called you children.”
—William Shakespeare (1564–1616)