Energy changes

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Across
  1. 4. is another term for burning
  2. 6. when exothermic reaction occurs
  3. 10. Magnesium+Oxygen
  4. 12. CalciumOxide+Water
  5. 14. is an exothermic
  6. 18. potassium+chlorine
  7. 20. process temperature decreases
  8. 21. when endothermic reaction takes place
  9. 22. substance that forms when water evaporates
Down
  1. 1. processes give out heat
  2. 2. processes give in heat
  3. 3. given out when metal reacts with water or acid
  4. 5. is a reaction in which substance combines with oxygen
  5. 7. acid reacts with carbonate is an endothermic reaction
  6. 8. reacts with water or acids, heat energy is given out
  7. 9. calcium oxide+water
  8. 11. substance that combines with and oxygen
  9. 13. Carbon+Oxygen
  10. 14. formula of carbon dioxide
  11. 15. Element that takes up 20% of the air
  12. 16. Reaction where substance reacts with oxygen
  13. 17. sweets is endothermic reaction
  14. 19. substance that forms when ice melts