Chemical ignition is the process where a substance, typically a fuel, begins to burn due to a chemical reaction with oxygen. This reaction produces heat and light, which are the visible signs of combustion. Ignition can occur through various means, such as a spark, flame, or high temperature, and is essential in many applications, including engines and heating systems. The ignition point, or the temperature at which a substance ignites, varies for different materials. For example, gasoline ignites at a lower temperature than wood. Understanding chemical ignition is crucial for safety in handling flammable materials and for designing efficient combustion systems.