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Biology students learn about osmosis
Posted On:
Thursday, January 14, 2016
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      Mrs. Holly Dungan’s Pre-AP Biology class at Melbourne High School has recently been studying osmosis and how it occurs in a cell. To supplement what they have learned, the students performed an extensive lab experiment of the osmosis process. To start, students measured the mass and circumference of a raw egg; after recording the data, they placed the egg in acetic acid (commonly known as vinegar) to dissolve the shell and allowed it to sit for 24 hours. On day two, Mrs. Dungan directed them to measure the egg again and observe the changes that had occurred.   Thereafter, the students placed their eggs in a variety of liquids, such as salt water, Coke, apple juice, orange juice, ginger ale, corn syrup, root beer, and other substances of their choice; this time, not only did they see changes in mass and circumference but also witnessed a change in the egg’s appearance. On day three, students made their measurements for documentation and then placed the eggs in water until the next day. On Day four, students once again measured and recorded their eggs then got to “pop” them, which is always an exciting and interesting scenario! Upon completion of the experiment, the young scientists were asked to discuss their findings in a written analysis of the data as well as create a mini-poster to present their findings to their classmates.

         

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