Across
- 2. something loud and has a pop and fire happening
- 6. can transfer thermal energy
- 7. tiniest unit in an element
- 8. visible energy produced by the flame
- 11. the spark or heat that starts a fire or engine
- 12. what humans breathe
- 13. combining elements together
- 15. hydrogen and carbondioxide combine
Down
- 1. are often used in cars
- 3. losing electrons or gaining oxygen
- 4. a fast violent reaction
- 5. after combining elements together
- 9. a product of a combustion reaction
- 10. related to electricity
- 14. gaseous products and particles released