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:
“African rights and liberty is a subject that ought to fire the breast of every free man of color in these United States, and excite in his bosom a lively, deep, decided and heart-felt interest.”
—Maria Stewart (1803–1879)
“O charitable philosopher, I beg you to help me. My mind is weak but my soul is strong. Kindle that soul, and the sacred fire shall never be extinguished.”
—James Boswell (1740–1795)
““Heap coals of fire on the head of your enemy” Mthis most uncharitable advice is found in a book [the Bible], of which charity is reckoned the standard principle.”
—Horace Walpole (1717–1797)