Questions on Osmosis and diffusion

1. What is the difference between osmosis and diffusion?

2. How does osmosis affect the movement of water molecules?
3. What is the role of a selectively permeable membrane in osmosis?
4. How does the concentration of solutes affect the rate of osmosis?
5. What is the process of reverse osmosis?
6. How does diffusion occur in a cell?
7. What is the difference between passive and active diffusion?
8. How does diffusion affect the concentration of molecules in a solution?
9. What is the role of a concentration gradient in diffusion?
10. How does the size of a molecule affect its rate of diffusion?