1. 1.3 Diffusion and Osmosis
Chapter 1

2. Diffusion
The movement of particles from an area of high concentration to an area of low concentration
The cell membrane is a selectively permeable membrane...it lets some things pass and not others (e.g. coffee filter)
Diffusion occurs until there is equilibrium...an equal number of particles on both sides

3. osmosis
the diffusion of water through a selectively permeable membrane (e.g. sponge)
Osmosis occurs when water particles move from a higher concentration to a lower concentration

4. Examples of osmosis
Equal movement of water in and out of cells

5. Examples of osmosis
2. More water moving into cell than is moving out

6. Example of osmosis
3. More water moving out of cells than moving in

7. Reverse osmosis
- water goes from low to high e.g. desalinate water, purify syrup