Across
- 3. biological catalyst
- 5. speeds up or slows down a reaction
- 7. two substances exchange
- 8. participates in a chemical reaction
- 9. one element takes place of another
- 10. reaction with oxygen
- 11. single substance breaks into 2 or more
Down
- 1. represents a chemical reaction
- 2. chemical change
- 4. forms in a chemical reaction
- 6. two substances combine one