FT 105 - Chapter 2 Crossword

4. substances that present special hazards because they react chemically with a large number of combustible organic materials
6. subatomic particle that is very light and has a negative electrical charge
7. type of reaction in which energy is absorbed when the reaction takes place
10. materials with boiling points of no greater than -150F
12. the temperature at which a liquid will convert to a gas
13. gas encountered by firefighters that is lighter than air (vapor density of 0.589)
15. 1973 report that identified a number of areas for improvement in the fire service
17. gas (commonly used in barbecues) that is heavier than air (vapor density of 1.52)
18. a measure that indicates the tendency of a chemical to dissolve evenly in a liquid
23. occurs when all the contents of a room or enclosed compartment reach their ignition temperature almost simultaneously, producing an explosive fire

1. When this type of change occurs, the molecules are altered
2. the basic building blocks of matter
3. type of reaction that will release or give off energy
5. the density the product divided by the density of water or air
8. When this type of change that occurs, such as a change from a solid to liquid or liquid to gas, the molecules remain intact
9. a fire with major building-to-building flame spread over a great distance
11. subatomic particle that is heavy and has no electrical charge
13. A substance with a pH of less than 7 is considered more...
14. point the lowest temperature at which a liquid produces a vapor that can sustain a continuous flame
16. mater that has neither a definite shape nor volume
18. consists of a portion of matter, which has a definite volume and definite shape
19. mater that has a definite volume but not a definite shape
20. A substance with a pH of more than 7 is considered more...
21. anything that occupies space and has mass
22. subatomic particle that is positively charged