Across
- 6. When this type of change occurs, the molecules are altered
- 7. matter that has a definite volume but not a definite shape
- 9. 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. a measure that indicates the tendency of a chemical to dissolve evenly in a liquid
- 16. the basic building blocks of matter
- 17. anything that occupies space and has mass
- 18. materials with boiling points of no greater than -150F
Down
- 1. occurs when all the contents of a room or enclosed compartment reach their ignition temperature almost simultaneously, producing an explosive fire
- 2. A substance with a pH of less than 7 is considered more...
- 3. consists of a portion of matter, which has a definite volume and definite shape
- 4. subatomic particle that is very light and has a negative electrical charge
- 5. subatomic particle that is heavy and has no electrical charge
- 8. the lowest temperature at which a liquid produces a vapor that can sustain a continuous flame
- 10. a fire with major building-to-building flame spread over a great distance
- 11. matter that has neither a definite shape nor volume
- 12. A substance with a pH of more than 7 is considered more...
- 15. subatomic particle that is positively charged