Diffusion+and+Osmosis

=Dirty Dozen Lab 1: Diffusion and Osmosis= media type="youtube" key="LeS2-6zHn6M?version=3" height="315" width="560" [|Lab Bench Lab 1]
 * 3 parts:
 * Diffusion
 * Osmosis
 * Plasmolysis
 * Kits
 * I've actually purchased and tested three kits for this lab from three major distributors (Ward's, Carolina Biological and Frey). Price point, Ward's is the cheapest of the three and I personally prefer their kit. This is not an expensive lab and the reagents involved are the same.
 * [|Ward's Lab 1]
 * [[file:AP Bio #4 - NEW TOC.pdf]]
 * [|Carolina Biological Lab 1]
 * [|Frey Lab 1]
 * [|Flinn Lab]
 * Without kits
 * This lab can easily be done without a kit as almost everything can be purchased at a grocery store. Having said that, I buy a kit refill every year because I'm too lazy to bother weighing out sugar for the sucrose solutions. Without a kit, you'll need to purchase:
 * Dialysis tubing
 * Lugol's solution
 * Corn starch
 * Testape
 * White granular sugar
 * Potatoes
 * Salt
 * Red onions
 * Probeware
 * As written, this is not a lab that can be done with probeware; however, there are several ways to study diffusion using probeware. My personal favorite involves filling dialysis tubes with pickle juice. Students can use a colorimeter, pH, and conductivity sensors to determine which molecules diffuse.
 * More open-ended approach
 * [|Diffusion - Molecules on the Move]

=Investigation 4: Diffusion and Osmosis= media type="youtube" key="x-shockwave" width="420" height="315"
 * Surface Area and Cell Size
 * Modeling Diffusion and Osmosis
 * Observing Osmosis in Living Cells