A few weeks ago, my science teacher (ms leong) conducted a lab lesson on "The Inside of Cells-The basic unit of life". We were told to do an experiment but before that, she instructed us to read the instructions first.
This is what we were told to do:
1) Add a drop of dilute iodine solution onto the middle of a clean slide
2) Gently scrape some cells from the inside of our cheek with a clean toothpick
3) Spread the scrapings onto the drop of iodine on the slide. Then throw the toothpick away after use.
4) Place one side of a coverslip close to the drop of iodine solution while supporting the other side of the coverslip with a mounted needle.
5) Gently and slowly lower the coverslip onto the scrapings
6) Examine the specimen under the microscope and draw what you see
After reading the above instructions, we started to do this experiment. The first 5 steps were very easy and most of us finished it very fast. However, the 6th step was the hardest because it was one of our very first few times touching/using the microscope and so, we could not see the cell very clearly like those in our textbooks. All we could see at first were just small black dots.
Finally, after some adjustments with the power, we managed to get quite a good view of the cheek cell which we extracted from our cheeks.
From this lesson, I have learned how to use the microscope to view cells clearly and also the different parts of the microscope which ms leong went through before the experiment.
This is a video on youtube that shows a person looking at his cheek cell through a microscope.
http://www.youtube.com/watch?v=frEFgP--MB4
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