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 air oxygen fire itself Combustion is a chemical reaction in which a substance reacts with to produce heat and light . 2 combustio arson fire burning The process of burning paper , wood , or ethanol is also known as 3 Paper Coal Candle Ethanol is an example of a clean - burning fuel because it produces very little smoke . 4 fuel fire ethanol patience heat lightning The three components necessary for combustion are , oxygen , and .