Diffusion+Lab


 * Diffusion Lab**

__Introduction__ This lab activity was a simple and fast activity. We worked in groups of three. We cut the pink jellies into 1 cm, 2 cm, and 3 cm cubes, and observed what happens when they are placed in HCL solution for 10 minutes. The goal of this lab was to find out why larger organisms have developed from more cells rather than larger cells.

__Evaluation__
 * 1) Things that went well :** Since it was a simple lab, everything went smoothly. We separated jobs and therefore worked efficiently. Mimi and Ugam cut the jellies and set the lab, and I worked on making data table.
 * 2) Things that didn't go well :** It was a little bit hard to cut the jellies because all six surfaces had to be identical. Although it was hard in the beginning, we soon found some tips to cut the jellies well. Also, when taking the jellies out of HCL and rinsing them, we had to be careful because HCL can be harmful when it touches the skin.
 * 3) What I learned :** I learned that diffusion rate doesn't change according to the cell size. Also, HCL cannot get through when the cube gets bigger and that is the reason why cells divide rather than keep growing.
 * 4) What I will change next time :** Next time, I will try to be more careful when handling HCL. Although my team has used HCL without any accident, there was one team that spilled their HCL solution. Since HCL can be harmful, I would try to be even more careful.