Across
- 3. the temperature ....... in endothermic
- 7. reaction is a chemical reaction in which energy is taken in
- 9. ......+ oxygen = magnesium oxide
- 13. when a substance combines with oxygen
- 14. when metals reac with water or acids heat ... given out
Down
- 1. physical quantity that expresses the degree of hotness or coldness
- 2. hydrogen + oxygen =
- 4. an example of endothermic reaction
- 5. ...... + oxygen = carbon dioxide
- 6. endothermic reaction example
- 8. another term for burning
- 10. the temperature ....... in exothermic
- 11. reaction in which a substance combines with oxygen
- 12. is one in which heat energy is given out