1. Cutting a piece of paper

3. Oil is less dense then water

5. Sugar dissolving in water

7. Crushed can

9. Melting Ice Cube

11. Flattening Metal

13. Cutting Wood

15. Copper sheet pulled into a Copper wire

17. Rusting of a car

19. Fireworks exploding

21. Steam

23. Leaves changing colors

25. Gas forming

27. Mold on Bread

29. Wood burning

31. Odor from a skunk

33. Cooking Eggs

35. Alka seltzer tablets

37. Statue of liberty

39. Baking a Cake

41. What is the difference between chemical changes and Physical changes?