The Chemistry of Fire

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Across
  1. 4. _________ __________ is a product of incomplete combustion.
  2. 8. An electrical outlet that catches on fire would be a "_____ _" fire.
  3. 11. This type of extinguisher leaves no residue.
  4. 12. A chemical reaction that absorbs energy and thus feels cold.
  5. 15. A substance that burns easily.
  6. 16. What is removed when you "stop, drop and roll"?
  7. 17. You are charging an electric scooter and it catches on fire. This would be a "_____ _" fire.
  8. 18. A fast, exothermic reaction where fuel reacts with oxygen.
  9. 20. A fire made out of a wood would be a "______ _" fire.
  10. 21. Most flammable fuels are organic and contain ______ and hydrogen, like methane (CH4) and propane (C3H8).
Down
  1. 1. Soot is fine, black, dusty carbon leftover from the incomplete combustion of a fuel normally due to lack of _______.
  2. 2. The amount of mass per unit volume of a substance. This determines whether a substance sinks or floats.
  3. 3. A natural fiber that is harder to ignite.
  4. 4. Gas produced by the complete combustion of carbon.
  5. 5. One way to increase the flammability of a material is to increase its ______ ______.
  6. 6. A fire at a gas station would most likely be "______ _"
  7. 7. The toxic gaseous and solid mixture produced by a fire.
  8. 9. The process of a liquid turning into a gas.
  9. 10. This is used to put out a fire.
  10. 13. You can tell whether a material is flammable or not by its ______ ______.
  11. 14. A chemical reaction that feels hot is ____________.
  12. 19. In order for a fire to occur there must be fuel, _______, and energy to start the reaction.