5 Science Facts about me

1. My Primary 1 and 2 science textbook was filled with disgusting bugs.
2. I disliked science the minute i heard about science
3. I got inspiration for science by other teachers(Sorry science teachers)
4. I usually stay up real late just to complete Science.
5. I prefer SIA more than Sci Bio.(Sorry Bio teacher, no hard feelings)

Just for reference, no hard feelings to anyone....

I hate flowers...until now

Before I start, I would like to say sorry to mother nature for killing so many flowers because of this experiment.
One of the days during a short break from school, I was given an assignment to change a white carnation's petals into 3 different colors. The thought of this experiment made me went back to my primary school examination questions, but I have never done the experiment in real life. To make a long story short, I killed the carnation...:(    It was not bloody or with any food coloring spurting everywhere. Therefore, I went to buy a bouquet of flowers.(Didn't want to buy so many but they only sell it that way.) So, I went back home and tried to do the experiment again. Ended up killing over 4 white roses in one day :((((((((((((((((((((((((.   Finally, i realized that my food coloring was too diluted and that it would take forever for the flower to change in color. Finally, i re-bought the food coloring and tried to do the experiment again. In the end, I was proud to announced that it finally worked. After tons of corrections and many dead flowers(I repeat, I am dead sorry), my flower started to change in color. So in my conclusion, we need to have patience, for mother nature is like us. Each type of things need time to complete. So, if you feel frustrated failing at this experiment countless of times, think again who should be the one frustrated...

Plants: Testing leaves for starch

 Just sharing a little from my Sci Bio class, we did a test on starch present in the leaves. We were given the following instructions:
1. Heat half a beaker of water over the Bunsen flame until the water boils.
2. Turn off the Bunsen burner.
3. Put the leaf into the hot water. (This is to make the leaf more permeable by softening it)
4. Put the boiled leaf in a test tube containing some alcohol. Then, place the test tube in the beaker of hot water.(The alcohol would remove the green pigment, chlorophyll from the leaf.)

5.Gently remove the leaf with a pair of forceps then
put it back into the hot water.
6.Remove the leaf and place it in a petri dish. Add a few drops of iodine solution until the leaf is just covered.
7. The leaf should appear blue-black(starch present)


If you see carefully, my leaf did not turn blue-black. Instead, it remained brown. Why? Reason was that the leaf cut from the plant was not fully exposed to the sunlight, which means that the leaf may not have photosynthesized.