The Chemistry of Fire

4. _________ __________ is a product of incomplete combustion.
8. An electrical outlet that catches on fire would be a "_____ _" fire.
11. This type of extinguisher leaves no residue.
12. A chemical reaction that absorbs energy and thus feels cold.
15. A substance that burns easily.
16. What is removed when you "stop, drop and roll"?
17. You are charging an electric scooter and it catches on fire. This would be a "_____ _" fire.
18. A fast, exothermic reaction where fuel reacts with oxygen.
20. A fire made out of a wood would be a "______ _" fire.
21. Most flammable fuels are organic and contain ______ and hydrogen, like methane (CH4) and propane (C3H8).

1. Soot is fine, black, dusty carbon leftover from the incomplete combustion of a fuel normally due to lack of _______.
2. The amount of mass per unit volume of a substance. This determines whether a substance sinks or floats.
3. A natural fiber that is harder to ignite.
4. Gas produced by the complete combustion of carbon.
5. One way to increase the flammability of a material is to increase its ______ ______.
6. A fire at a gas station would most likely be "______ _"
7. The toxic gaseous and solid mixture produced by a fire.
9. The process of a liquid turning into a gas.
10. This is used to put out a fire.
13. You can tell whether a material is flammable or not by its ______ ______.
14. A chemical reaction that feels hot is ____________.
19. In order for a fire to occur there must be fuel, _______, and energy to start the reaction.