1. Physical & Chemical Changes Demonstration powerpoint

2. Physical Changes Physical changes are when the substance is still the same thing. It has only changed forms.

3. Size Breaking a piece of mossy zinc into pieces.

4. Shape Bending a piece of magnesium strip.

5. State Boiling off the water from salt water. You are left with the salt. Evaporation. Dry ice (frozen CO2) goes from a solid to a gas; this is called sublimation.

6. Chemical Changes Chemical Changes are when a new substance is produced that was not there originally.

7. Color (unexpected color change)

8. Clear liquid (ammonia) + clear liquid (PHTH)

9. Add PHTH to ammonia

10. = pink (unexpected color change)

11. Temperature (unexpected temperature change)

12. Ammonium nitrate + water

13. Starting temperature 20⁰ C

14. Add ammonium nitrate to water

15. a temperature decrease of 8⁰ C

16. Bubbles & Fizz

17. HCl + magnesium strip

18. = bubbles and fizz

19. New Substance (precipitate)

20. Milk + vinegar =

21. Swirl it around

22. Chunky stuff

23. Steel wool + vinegar = rust Another precipitate!