1. Diffusion Investigation

2. Food Coloring into Water

6. Experimental Set-Up
Corn starch solution
Iodine Solution

7. Iodine Indicator with Foods

8. Basic Reaction with Iodine Indicator

9. Results from reaction

10. Adding Cornstarch to Green Water

12. After 24 Hours

13. Reaction in Teach Tank Before

14. Reaction in Teach Tank 24 Hours Later

15. Why did the iodine go in and out of the bag and other items didn’t?
Why did the iodine stop going into the beaker? (After 24 hours, most of the iodine was still in the bag)

16. Matter Atoms Molecules Compounds

17. Areas of high concentration move into areas of low concentration until there is equal concentration of the substance Example: sugar cube

18. Examples of Diffusion Kool-aid powder poured into water Tea with sugar
Smelly feet- odor travels across the room
Perfume
Air Freshener
Tie Dye

19. Passive transport
Materials move through the cell without using the cells energy

20. Osmosis
Diffusion of water across the cell membrane Required no energy

21. Active Transport
Process of using energy to move things across the cell membrane
Examples that require cell’s energy to move
Salt out of the cells
Oxygen
Carbon Dioxide
Sugars

22. Cell size affects transport
Cells have to be small in order to do their jobs; small size = greater surface area

23. Gobstopper Connection
At the beginning of the year, we did an experiment with gobstoppers. Go back to those pages and add the explanation for the experiment

24. Gobstopper Explanation
Color spread because of diffusion. The area next to the candy had a high concentration of sugar and dye. The water had a very low concentration, therefore the dye and sugar moved into the water