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Teachers' Domain - Digital Media for the Classroom and Professional Development Search Teachers' Domain Go User: My Folders Loading... Create a new folder Upload Media My Groups No groups created yet. Create a new Group Join a Group My Profile HELP | SIGN OUT Please sign in for full access This Teachers' Domain feature requires registration, which is simple, safe, and free. Register Now Citation "On Fire." Teachers' Domain. 29 Jan. 2004. Web. 3 Feb. 2012. .

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Signing in now will connect your and Teachers' Domain accounts, so that in the future you will automatically be signed into Teachers' Domain when you come from . On Fire Resource for Grades 6-12 | Citation Media Type: Interactive Running Time: Size: 93.1 KB View SAVE TO FOLDER Loading... Save Cancel Share | Source: NOVA: "Fireworks!" This resource can be found on the NOVA: "Fireworks!" web site. Resource Produced by: Collection Developed by: Collection Credits Collection Funded by: See Also: National K -12 Subject: Chemical Change Chemical Reaction and Electrons Lesson Plans Using this Resource: Igniting Chemistry in Fireworks This interactive activity from the NOVA Web site allows you to explore the basics of fire, including the complex molecular interactions between oxygen and other substances that cause combustion, or burning, as well as the chemical and physical properties of a flame. Alternate Media Available: On Fire (HTML version) (Interactive) Background Essay The anatomy of a candle flame is complex, and both physical and chemical reactions are involved in producing it. In a room with still air, a flame hardly flickers. It burns at a fixed distance above a pool of melted wax. Everything is in balance, as wax is consumed, light emitted, and heat produced. Enclosed within the flame's bright yellow tongue is a dark cone that rises from below the curl of the wick. At the bottom of the flame -- around the wick but not quite touching it -- is a blue region of lesser brightness that seems to envelop the base of the dark and yellow regions above it. As a flame burns, heat radiates equally in all directions and melts the candle's solid wax into a hot liquid pool of usable fuel. Where the melted wax meets the heat of the flame, it evaporates, forming a gas. This vaporized fuel floats up from the wick and out to the edges of the dark zone. Here, wax vapor meets oxygen molecules from the air. This is the main reaction zone, where combustion takes place. Measuring about 1,400 degrees Celsius, this glowing blue region is the hottest part of a flame. The products of this combustion flow up into the yellow tongue of the flame, which is made up of carbon particles heated to incandescence. Fuel molecules that don't burn up right away -- because not enough oxygen is present -- combine to form particles called soot, which swirl around inside the body of the flame without actually burning. Eventually, though, most of the soot enters the reaction zone and burns blue like the rest of the fuel. But if the reaction zone is not very efficient, the soot may escape the flame without burning. Outside the flame, soot cools quickly and drifts upward as black smoke. Print Background Essay Discussion Questions What are the steps that occur during the combustion of hydrogen? What are the steps that occur during the combustion of methane? 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