1. Please take out your homework.
draw a picture of a water molecule. Label the positive and negative parts.

2. Osmosis

3. Effects of Osmosis can be serious for a cell!
Hypotonic
Hypertonic
Isotonic
No net change
Water out
Of cell
Water into cell

4. Hypo Hypo Hippo

5. How cells cope

6. Osmosis & Plants

7. Plant Cells & Osmosis
Plasmolysis

8. Hypotonic environment
Causes turgor pressure.
Plant is healthy.
Hypertonic environment
Causes wilting.
Plant is unhealthy.
Plasmolysis

9. One Last Time

10. Osmosis Reading
“Osmosis” pp
Answer # 2 & 3 p. 100.

11. The Potatoes! Each potato slice will go into a different solution
The first will go into a beaker of pure water
The second will go into a beaker of water and salt (lots of solute)
Predict what will happen to each slice as it soaks in its solution. Make sure you:
Predict if each slice will gain water, lose water, or be unaffected
Identify the solutions as hypotonic, isotonic, or hypertonic