27th September 2010

Viewing our cheek cells under the microscope!
Today, we started off the lesson by going through the notes about cells. We went through some examples of different tissues and organs. Afterwards, we went on to do a practical experiment. The experiment was about viewing our cheek cells under the microscope.

Here are the steps:

1) Using a toothpick, gently scrape the inside of your cheek
2) Spread the specimen on the glass slide.
3) Let it dry for about a minute.

4) Put a drop of iodine over the specimen.

5) Carefully place a piece of cover slip over the specimen.

6) Place the slide on the stage of the microscope

7) Adjust the coarse focus knob and objective lens to make the specimen clear for viewing.

1) Scrape cheek gently

2) Spread over slide

3) add a drop of iodine

4) cover specimen with cover slip

5) Place specimen under microscope

6)What you will expect to see:

21st September 2010

Making a cell using inedible materials



Today, we conducted a practical experiment on creating a cell using inedible materials we we were told to bring the lesson before by Mdm Riza. My groupmates were Ming Ze, Alec, Yi Heng and myself. I brought some strings to represent the ribosome and Golgi apparatus . Ming Ze brought a piece of brown paper that was crumpled into a ball and taped to represent the nucleus. Alec brought an eraser that was coloured green to represent the mitochondrion. And Yi Heng brought a piece of plastic to represent the endoplasmic reticulum. We took some beads and beans to represent the vacuole and other unidentified parts. We took a photo after placing each material into the agar which is the cytoplasm.