What is Fire, (As in a Naked Flame)?
919229
FIRE is rapid oxidation.  It is a chemical reaction between oxygen  and other materials (solid or liquid).  The flame you see is the point at which the material is converted into a gas.  This point is called the sublime.\n  To maintain sublimation (flame) you must have a constant supply of materials (solid or liquid) and a constant supply of oxygen.  \n  Fire is made by raising the temperature of a material (solid or liquid) to its point of sublimation in an oxygen filled enviornment.\n  FYI,  RUST is slow oxidation
54695
Fire, as a label, is a variable. \n"n.\n1.a. A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance." (1)\n\nTo strip out the longer words, fire is something combining with oxygen rapidly enough to produce heat and to be seen as a flame.\n\nDifferent materials do this at different temperatures. The temperature where a fire starts is called a flash point.\n\n"Flash point is the lowest temperature at which a liquid can form an ignitable\nmixture in ... The fire point is usually a few degrees above the flash point. ..." (2)\n\nHere are some sample *fire points* from Wikipedia:\n"   * Silane: <70°F (21°C)\n    * White phosphorus: 93°F (34°C)\n    * Carbon disulfide: 212°F (100°C)\n    * Gasoline: 495°F (257°C)\n    * Butane: 806°F (430°C)\n    * Magnesium: 883°F (473°C)\n    * Hydrogen: 1060°F (571°C)" (3)\n\nWhere we say "ouch" is our "pain point." (4)\n\nIt's a good idea to keep fingers out of fire, but burning ourselves does not need fire. Flame is not the only factor. I have been burnt by hot roofing tar -- 500 degrees F, but not on fire.\n\nThat's probably more than you wanted to know from this question, but it's been sitting here a couple of hours so I thought I'd essay it.
1182331
Fire is a visible sign of combustion - an exothermic oxidation reaction. \n\nExothermic means that it releases energy.  In the case of visible fire (not all "flames" are visible) some of the energy is radiated at frequencies in the visible light waveband.\n\nBTW: color is related to temperature - "red hot" is around 500 C
868915
Burning is something that happens to solids before they become a liquid and then a gas. The melting, boiling and evaporation points for water prevent it from being burned in any of it's states.
384502
Conductive heat or objects that conduct heat....  These are things that have the properties to burn.  ex: a house on fire, is considered a conductor.\n\nThe heat comming off that building is called radiant heat and the house next door that is steaming because water was spraied on it is called convection heat.\n\nMore simple would be if you turn on yourstove top, the fire or the red heat coil (electric stove) is the conductor or is conduction heat,  the heat you feel comming off the burner is radiant heat and when youturn off the burner the heat that is left , that if you touch you  get burnt is convection heat.
882184
Fire is simply a term that we use to describe a chemical reaction that results in the release of incandescent gas (usually due to the effects of the high temperature of the reaction on the reaction product (gas)).\n\nOrdinary wood fires are not hot enough to create plasma, the fourth state of matter. The sun is an incandescent ball of plasma, so it is technically not "fire" although it may appear to be so. A burning match, while hot, is not nearly hot enough to convert gas into plasma.
1117399
Both are unanswerable questions. Fire does not weigh anything. It is just really hot air (a plasma), caused by the combustion of molecules.\n\nWind does not start or end. It's caused by uneven heating of the Earth's surface. This causes the warmer air and the colder air to move, according to gas laws.
465006
Fire is not matter. The combustible material is a 'solid' like  wood, but can be a 'liquid' like gasoline. The wood combusts, releasing 'gases' such as Carbon Monoxide and solids such as ash particulates. The "fire" is the energy released in the form of heat and light. That's my simple explanation.
206705
It isn't but there are some particles in the atmosphere that are flamable, but they are so widly spaced you won't even see a fireball, Anyways oxygen has a special chemical compound that feeds fire, but thats all, its not "flamable" its just food for fire.
817405
fire, im a pyro.  : )
704507
1 n,. A slow match; also, a torch. to set lunt to: to set fire to.\n2 a,. Of a horse: Spiritless, tame (obs.)\n3. v,. To smoke, emit smoke.
451194
Fire is basically a mixture of hot gases.\nHence it's state can be taken as gaseous.\nI thinks "fire" in your question means flame.\nIf flame is very hot, then gases nearby get ionized and we get plasma- another state of matter
560162
Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat. (from www.straightdope.com)\n\nThe typical, bright, yellowish-orange upper part of a flame is due to the heating of unburned carbon particles.\n\nThe temperature of the fire and the material being burned are the factors that determine the color of the flame. The various colors of flames in a wood fire are due to the different substances in the flames.
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Hot hottest part of a non-luminous flame (as opposed to a cooler, luminous flame) is just above the inner cone, inside the flame.\n\nIn this picture,\nhttp://www.amazingrust.com/Experiments/how_to/Images/flame.jpg\nyou can see that a wire is suspended right at the hotest past of the flame.
408192
you need three things to create a flame:  heat, oxygen, and fuel.  In the air, you have oxygen.  The phosphorous is the fuel, so if you apply a heat source, you will see a flame.  I don't know what makes a firefly glow.
722191
the fire needs oxyegen to burn.  There is no oxygen in the tube as the pressure of the gas forces the contents to flow out towards the flame.
474892
Fire is not a chemical, so there is no chemical symbol to represent it. However, numerous things burn, and these can be adequately described by a reaction. For example, wood is primarily cellulose: \n(C6H12O6)n + O2 --> H20 + C02 + heat + light\nPS. The above reaction is unbalanced. This is what happens when wood is burned - it turns into water and carbon dioxide. Note that "normal" fire only happens in the presence of oxygen. I say "normal" because there are other types of fire that don't involve oxygen.\nWe don't see any water because it evaporates from the heat of the fire as soon as it is formed. \nThe heat given off is the heat of the fire (obviously). \nThe light produced is what you see as fire.