What is fire made of?
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A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance.\nAn oxidising reaction takes place which gives off light and heat to form a flame. The burning process converts oxygen and other substances into a mixture of gases, water vapour and small solid particles which we call smoke. The gases are mostly carbon dioxide - C02 and carbon monoxide - CO.\nThe smoke particles, or soot, are mostly unburned carbon (C). If you hold a polished metal spoon above a candle flame it will become stained with soot. Smoke contains water vapour which is produced when the hydrogen from the candle wax combines with oxygen in the air.
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.
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"These substances" refers to what?\n\nThe product of combustion include the oxides of carbon-mono and di, water vapor, unburned hydrocarbons and mineral ash.
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Shuttles bring oxygen with them, because they have to burn their fuel to propel themselves through space.  It is because they carry liquid oxygen that they are so incredibly dangerous.\n\nBut really, fire is just an oxidation/reduction reaction.  All you really need are an oxidizer, a reducer, and heat.  Oxygen gas in the air serves as the oxidizer for most fires, and carbohydrates (lignin, cellulose, oil, petroleum, coal, etc) serve as the reducer in most fires you see.  But some rockets use nitrogen dioxide as the oxidizer instead of oxygen.  You could, theoretically, use hydrogen gas and chlorine gas to make a flame in the absense of oxygen--but oxygen is the only common and abundant oxidizer, since it is created as a byproduct of photosynthesis in plants and cyanobacteria.
1085438
You have forgotten the elements of fire. You need fuel, heat and oxygen. Too much oxygen or air like blowing on a candle doesn't allow for heat to burn the fuel, in this case the wick of a candle. It takes time for combustion to happen in the case of a candle since it's so small. You can't say the same for a forest fire or a building on fire. But dowsing it with water like a fire hose will eventually prevent combustion from happening.
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Fire is oxidation of a material at a fast rate. The aluminum foil you put in the stove getx a coat of aluminum oxide on it and then goes no further as a gas oven is not hot enough to "burn" aluminum. Aluminum can be burned if one gets the temperature hot enough. This is called the thermite reaction and happens when finely divided aluminum, such as shavings is mixed with iron oxide (rust) and the mixture set afire with a fuse perhaps made from thin strips of magnesium metal. The iron oxide or rust becomes iron metal again and the aluminum becomes aluminum oxide or alumina. The heat is intense enough to melt iron.Such reactions are used in industry to perform welding. It is all quite dangerous and a person not familiar with the laws of chemistry may become blinded by the light of the reactions involved or harmed by server burns. Do not try this at home.
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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.
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As mentioned by someone previously the "firey" part of fire is plasma, which is a fluid composed of free electrons and positive ions (atoms stripped of one or more electrons). Plasma is sometimes referred to as the "4th state of matter".\n\nThe light you see is emitted when electrons "move" from an atomic orbital of higher potential energy to an orbital of lower potential energy, the potential energy of the electron being converted to light. The colour of the light depends on precisely what the energy difference is, and in the case of standard fire the colour we see is actually a mixture of many colours.
747028
as anyone who was in the Boy Scouts can tell you, there are many ways to produce fire without a flame. The ol rubbing two stciks together works but it does take a while. The very basics you need to make fire is a heat source ( friction ), tinder (dry grass or leaves ), or a spark from flint on steel.
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Flame, as opposed to fire, is primarily a plasma, which means that it's a gas in a an excited state. As a substance burns the heat produced causes it to vapourise. As a result solids and liquids don't strictly burn, rather it is the gas evaporating off them that burns. \n\nAs the gas starts to burn it starts to break down into chemically smaller components. As a reuslt of the breakdown the electrons within the gas components become excited and unstable. As they collapse into more chemically stable forms like carbon dioxide the gases lose that excited state in the form of radiated energy that we detect as light and heat. \n\nAs a rsult we see flame as a bright light, sense it as being hot and see it flicker and waver, since it exists as a gas in air. It also only exists for a relatively short distance above the burning substance because the chemcially excited form only exists for a relatively breif period.
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since a "certain" soft metal on burning produces lime  lime cannot be an element . hence the answer is 'c'\nanswer : 'c'\n  note: the soft metal is calcium
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Burning is rapid oxidation. What's left after something has burned, are the elements that wouldn't oxidize rapidly.
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None of the above mentioned.\n\nDefinition of fire: a chemical reaction between a fuel (Wood) and oxygen in the air. \n(Its the rising carbon atoms and other material emitting the light we perceive as fire).
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Because, it was smoking before but the fire *combustion* was using all the smoke to sustain the fire.   When the fire was put out, the material was still producing flamable gasses but they were just going into the atmosphere insted of burning. \n\nyeah and eat that bad sentance structure grammar crazy person above me!
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Hot air is less dense than cold air.\nThe air around the fire is very hot and bends light like a lens. \nAs the fire is not uniform, the air heats and cools with the flames. This causes light to bend in different degrees. Your eyes follow these changes the objects behind the fire seems to be shimmering.
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Fire, Earth, Metal, Water, Wood.
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Fires need oxygen to burn.