Across
- 1. portable vapor detector
- 3. any material used to start or sustain a fire
- 6. what does BTU stand for
- 8. when fuel burns without a flame
- 11. explosive with detonation velocity less than 1,000m/s
- 12. What type of chemical reaction is fire
- 14. chemical transformation which heat energy is absorbed from surroundings
- 16. heat transfer from heated to cooler surface
- 19. chemical transformation in which heat energy is liberated
- 20. kerosene and gasoline are...
Down
- 2. light that occurs after a explosion
- 4. rapid combination of oxygen with another substance
- 5. a fire started deliberately
- 7. minimum temperature which fuel ignites spontaneously
- 9. what direction does a fire move
- 10. movement of heat through solid object
- 13. ability of a system or material to do work
- 15. heat liberated during combustion
- 17. minimum temperature which liquid fuel produces enough vapor to burn
- 18. heat energy transfer by movement molecules in a liquid or gas