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