1. Movement of substances Chapter 3 1) Diffusion 2) Osmosis 3) Active Transport

2. 1) Diffusion

5. Example of diffusion

6. Concentration gradient concentration distance Direction of movement of molecules concentration difference

8. Solutions sugar + water dissolves sugar solution ( solute ) ( solvent ) ( solution ) Solute : the substance that dissolves in a liquid; can be soluble or insoluble in a given solvent Solvent : a liquid which dissolves other substances +

9. Diffusion of dyes

10. Diffusion of dyes

11. 2) Osmosis

14. Osmosis

17. Osmosis - High solute - Low solute - High water potential - Low water potential

18. Investigation 3.2 (pg. 27) Aim: To demonstrate osmosis (partially permeable membrane) ( low water potential) ( high water potential)

19. Reverse osmosis

20. Water potential

21. Reverse Osmosis partially Direction? Direction?