Across
- 3. point the lowest temperature at which a liquid produces a vapor that can sustain a continuous flame
- 4. the basic building blocks of matter
- 5. subatomic particle that is positively charged
- 6. subatomic particle that is very light and has a negative electrical charge
- 9. anything that occupies space and has mass
- 10. A substance with a pH of less than 7 is considered more...
- 15. substances that present special hazards because they react chemically with a large number of combustible organic materials
- 16. the density the product divided by the density of water or air
- 18. a fire with major building-to-building flame spread over a great distance
- 20. consists of a portion of matter, which has a definite volume and definite shape
- 21. mater that has a definite volume but not a definite shape
- 22. mater that has neither a definite shape nor volume
Down
- 1. gas (commonly used in barbecues) that is heavier than air (vapor density of 1.52)
- 2. subatomic particle that is heavy and has no electrical charge
- 6. type of reaction in which energy is absorbed when the reaction takes place
- 7. A substance with a pH of more than 7 is considered more...
- 8. gas encountered by firefighters that is lighter than air (vapor density of 0.589)
- 11. When this type of change occurs, the molecules are altered
- 12. 1973 report that identified a number of areas for improvement in the fire service
- 13. When this type of change that occurs, such as a change from a solid to liquid or liquid to gas, the molecules remain intact
- 14. the temperature at which a liquid will convert to a gas
- 16. a measure that indicates the tendency of a chemical to dissolve evenly in a liquid
- 17. type of reaction that will release or give off energy
- 18. materials with boiling points of no greater than -150F
- 19. occurs when all the contents of a room or enclosed compartment reach their ignition temperature almost simultaneously, producing an explosive fire