Completar Frases Fill in the Blanks: Understanding Combustion and FlameVersión en línea Test your knowledge on combustion processes and flames in this engaging fill-in-the-blanks game! por Demetrius Sam Daniel 1 itself air fire oxygen Combustion is a chemical reaction in which a substance reacts with to produce heat and light . 2 combustio fire burning arson The process of burning paper , wood , or ethanol is also known as 3 Paper Candle Coal Ethanol is an example of a clean - burning fuel because it produces very little smoke . 4 lightning heat fire patience ethanol fuel The three components necessary for combustion are , oxygen , and .