Across
- 1. A new material that can form
- 5. Helps people feel better
- 6. To join substances together
- 9. A new substance formed
- 12. To split a substance apart
- 13. A strong metal mixture
- 14. A change that makes a new substance
- 16. An example of a chemical reaction when baking
- 17. A starting material in a reaction
- 19. A product of some reactions
Down
- 2. A gas used in many reactions
- 3. What materials like concrete help do
- 4. To combine substances together
- 7. A strong material used in tools
- 8. Needed for reactions to happen
- 9. A man-made material
- 10. Something that may change in a reaction
- 11. Energy that may be released
- 15. What happens during a reaction
- 18. Bubbles formed in some reactions