1. Physical and Chemical Change Year 8 Science Ms Alexander

3. Chewing my breakfast

5. Burning toast

6. What are products and reactants?

8. Break-down

9. Precipitation

10. Combustion

14. Decomposition in your compost heap!

15. Start with: Plant material--> C

18. Example Fireworks, a Bunsen burner, Human respiration

20. Combination Breakdown Reaction

23. On a new page.... ? What effects the rate of a chemical reaction?

25. Cut and paste

27. What happens if we decrease the energy?

29. Cut and paste

30. What happens if we remove reactants?

32. But they do not combine with reactants.

33. Example: Catalytic Converter Movie