Ignition occurs when the heat produced by a reaction becomes sufficient to sustain a chemical reaction. The sudden change from a cold gas to a hot plasma in a plasma source is also called ignition. This page is about the physical properties of gas as a state of matter In Physics and Chemistry, plasma is an Ionized Gas, in which a certain proportion of Electrons are free rather than being bound

See also: Making fire

Other uses of ignition include:

• in chemistry, it refers to heating a material to the point that it spontaneously combusts, or until it ceases to lose mass. Many different techniques for making fire exist Smoldering plants and trees or any source of hot Coals from natural fires is the oldest way to make a fire Chemistry (from Egyptian kēme (chem meaning "earth") is the Science concerned with the composition structure and properties Combustion or burning is a complex sequence of Exothermic chemical reactions between a Fuel and an Oxidant accompanied by the production of
• in nuclear fusion, it refers to the conditions under which a plasma can be maintained by fusion reactions without external energy input. In Physics and Nuclear chemistry, nuclear fusion is the process by which multiple- like charged atomic nuclei join together to form a heavier nucleus
• in semiconductor processing, ignition is the process of starting up a plasma generator. Semiconductor device fabrication is the process used to create chips the Integrated circuits that are present in everyday Electrical and electronic In DC plasma systems, this involves a transition from voltaic arcing to sustained and delocalized plasma generation. Direct current ( DC) is the unidirectional flow of Electric charge.
• an ignition system is a method for activating and controlling the combustion of fuel in an internal combustion engine, often through the use of a key

Ignition may also refer to:

• Ignition (song), a hip hop song by artist R. An ignition system is a system for igniting a fuel-air mixture " Ignition (Remix " is a single by R&B Singer R Kelly from his Chocolate Factory album in 2003 Kelly
• Ignition, Portable Sounds, a christian rock/hip hop song by tobyMac
• Ignition (Trivium song), a song by American metal band Trivium
• Ignition (album), an album by the punk rock band The Offspring
• Ignition (computer game), a top-down racing game for PC published in 1997
• Ignition (event), a Burning Man regional event held in Montreal, Quebec
• Ignition (film), a 2001 film
• Ignition Entertainment, a computer video games company founded in 2002