1. OSMOSIS & DIFFUSION

2. Food Coloring Versus Water

3. Solutes and Solvents Solute- Anything that is dissolved by a liquid.
Solvent- Anything that does the “dissolving”
Solution- The end product after the solute has dissolved into the solvent.
Concentration- The amount of a substance per defined space.

4. What is the powder and Sugar?
Which is which?
What is the powder and Sugar?
What is the water?
What is the
Kool-aid?

5. Cellular Transport
Diffusion- is the movement of molecules across a cell membrane from an area of high concentration to an area of low concentration.

6. Now let’s talk about a type of Diffusion!!!

7.  Types of Diffusion
Osmosis is the diffusion of water across a semi-permeable (or selectively permeable**) membrane, caused by a difference in solute concentrations on the two sides of the membrane.
** a selectively permeable membrane is one that allows only certain materials to cross it.

8. Osmosis
Osmosis can mean going from high to low concentration or even low to high concentration.
It will flow in the direction that will help the cell reach an isotonic solution.
What is happening in this picture?

9. Hypotonic Vs. Hypertonic
A Hypotonic Solution is a solution where there is more water and less solute.
A Hypertonic Solution is a solution where there is less water and more solute.
An Isotonic Solution is a solution where the solvent and the solute are equal on both sides of the cell membrane. (think equilibrium)

10. Comparing Osmosis and Diffusion
Let’s Compare!
Comparing Osmosis and Diffusion

11.  Real-Life Example
If Cells are place in distilled (explain) water what will happen, and why?
2) If cells are place in a salt solution, what will happed and why?

12. Football Player Story