Chemical reations & Material Creation

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Across
  1. 5. Required to break and form bonds
  2. 7. dioxide Gas produced from vinegar and baking soda
  3. 9. Small molecules that form polymers
  4. 10. Tiny particles that rearrange during reactions
  5. 11. Building material formed through reactions
  6. 13. Substance formed when iron reacts with oxygen
  7. 16. Material made from chemical reactions
  8. 18. Product of hydrogen and oxygen combining
  9. 19. Reaction where one element swaps with another
  10. 22. Substances formed after a reaction
  11. 23. Reaction where substances combine
  12. 25. Created using chemical reactions
  13. 27. A process that changes substances into new ones
  14. 28. A visible change during some reactions
Down
  1. 1. Clues that show a reaction has occurred
  2. 2. Reaction where a substance breaks apart
  3. 3. Long chains of repeating molecules
  4. 4. Element involved in making water
  5. 6. Reaction that absorbs energy
  6. 8. Alloy made from iron and carbon
  7. 10. Mixtures of metals for strength
  8. 12. Starting substances in a chemical reaction
  9. 14. Can increase or decrease during reactions
  10. 15. Gas involved in rusting and many reactions
  11. 16. Process where plants use chemical reactions
  12. 17. One sign of a chemical reaction (bubbles or fizzing)
  13. 20. Reaction that releases energy
  14. 21. A new substance that may form from liquids
  15. 24. Energy sometimes released in reactions
  16. 26. Metal used in replacement reaction examples