Firefighters and chemical reactions
Across
- 3. What can be used to put out a fire?
- 4. dioxide What gas is released when something burns?
- 5. What is fire an example of?
- 6. A change of state from a liquid to a gas
- 9. A change of state from a solid to a liquid
- 11. The amount of energy required to start a chemical reaction
Down
- 1. A chemical reaction which absorbs more energy than it releases
- 2. What is the device that makes a loud sound to warn about a fire called?
- 3. What is the opposite of "flammable"?
- 7. What tool do firefighters use to break through doors and walls?
- 8. What gas is required for fire?
- 10. What is the chemical symbol for water?
- 12. A chemical reaction which releases more energy than it absorbs