Across
- 2. a substance that burns very quickly creating a lot of expanding gases.
- 8. The process of burning substances in air or oxygen with the release of heat and light.
- 9. Class C fires are those which involve ______
- 11. fire is used for heat, light, and _____.
- 13. a soda-acid fire extinguisher uses acid to react with bicarbonates of metal to release _____.
- 15. used as an oxidizer in gunpowder.
Down
- 1. A substance that burns easily
- 3. Only substances that _____ burn with a flame.
- 4. Non-luminous zone or the zone of complete combustion is the ____ part of the candle flame.
- 5. also known as the zone of incomplete combustion.
- 6. The lowest temperature at which a combustible substance starts burning
- 7. material that stores chemical energy which is released through combustion.
- 10. It has the highest calorific value.
- 12. Substances that have a very low ignition temperature and hence can catch fire easily.
- 14. a chemical reaction in which a substance combines with oxygen.