Across
- 3. Form of limestone reacting slowly
- 6. The amount of energy needed for a reaction to begin
- 7. The amount of particles in a given volume
- 8. The unit of time
- 10. Form of limestone reacting fast
Down
- 1. The speed with which a particular chemical reaction progresses
- 2. The larger that is the faster the rate of reaction
- 3. Particles must do this before they react
- 4. A substance that changes the rate of reaction without being used up
- 5. Increasing the temperature gives the particles more ……….
- 9. A biological catalyst