Across
- 3. What is methane ?
- 8. Conservation of mass is a what change ?
- 9. In thermal decomposition a single compound breaks down into simpler compounds and what ?
- 10. Magnesium oxide, nitrogen dioxide and oxygen are a reaction from what ? (9,7)
- 12. Combustion is a what change ?
- 13. Exothermic changes are what type of changes ?
Down
- 1. If you heat copper carbonate what happens ?(6,4)
- 2. word equation- nitrogen+ oxygen -> nitrogen ...
- 4. What is the name of this chemical formula, CH4 ?
- 5. What do you use to heat things in experiments ?(6,6)
- 6. When a combustion reaction takes place what is the energy transferred as ? (4,3,5)
- 7. Using an ice pack it is a what change ?
- 11. Melting and what are endothermic changes ?
- 13. What do two elements joined together make ?