Fill in the Blanks FIRE TRIANGLE ACTIVITYOnline version Fire Triangle: Fill in the blanks using the word bank on the right. You have 3 chances to get everything correct. by Colleen Yaremko 1 ignites extinguished fire Fuel chemical reaction combustion Heat three Oxygen 1 . Fire is a . 2 . is an element that sustains ( keeps the fire burning ) . 3 . is the element that is burning . 4 . Take any one of the elements away from a and it will be . 5 . is the element that the fuel .