Across
- 3. a substance that speeds up a chemical reaction
- 5. substances that result from a chemical reaction
- 6. absorb heat energy
- 8. a process that produces a chemical change
- 10. how fast a reaction occurs after it has started
Down
- 1. substances that exist before a reaction
- 2. release heat energy
- 4. the amount of substance present in a certain volume
- 7. a substance that slows down a chemical reaction
- 9. proteins that speed up cell reactions