1. Explain what is happening in this clip.

2. Objective: You will be able to explain how molecules move across a semi-permeable membrane due to a concentration gradient. Diffusion & Osmosis

4. See an animation of diffusion here: http://lewis.eeb.uconn.edu/lewishome/applets/Diffusion/diffusion.html

5. How did the gummy bear lab illustrate diffusion? Explain or draw a diagram

7. Did the gummy bear lab illustrate diffusion or osmosis? Explain your answer

9. http://www.usd.edu/~bgoodman/Osmos.htm What happens when the concentration of water differs on both sides of a membrane?

10. See an animation of osmosis here: http://lewis.eeb.uconn.edu/lewishome/applets/Osmosis/osmosis.html

12. Normal Distilled water Salt water Isotonic cells Hypotonic cells Hypertonic cells

13. Define selectively permeable membrane

15. For more information on diffusion & osmosis, click here: http://edtech.clas.pdx.edu/osmosis_tutorial/default.html

16. Why are osmosis & diffusion important?