Kamis, 20 September 2012

Experiment on Yeast cell


Today, we are experimenting about yeast cell. As you know, yeast produce Carbon Dioxide and Alcohol when they grow and divide. We are proving too that cell need energy to grow. So, we have an experiment. First, pour 250 ml of hot water to a flask 1 and flask 2 (we need 2 flasks) . Add a teaspoon of Fermipan yeast and a teaspoon of  sugar to flask 1 and only a teaspoon of yeast to flask 2. Cover both flask with a baloon. Here how it works: mesure the ballon every 5 minute. As the yeast grow and divide, it produce more carbon dioxide and alcohol. The flask with most cell will have a bigger baloon. You will find out that Flask 1's baloon is bigger than the flask 2's baloon. This is because the sugar in flask 1 provide energy for the yeast to grow and multiply faster. The more yeast present, the more carbon dioxide and alchohol are produced.
This is my team at work, I'm the far right
 
This is the result, the big baloon is flask 1 and the small one is the flask 2
For more info of yeast, please visit: http://en.wikipedia.org/wiki/Yeast
 

Thats all for today bye!
 

What happen to my blog

I know it has been long since I have not write on my blog and don't think i'm gonna abandon this blog. Since I have moved to grade six, I have not write anything since my teacher don't ask me to write anything. This time my science teacher is Mr.Edmar from the philliphines, not Mr.Anjar anymore. For me, he is a little boring than Mr.Anjar who like to make things funny. Most of the time Mr.Edmar dosent have any expression on his face. he's like a robot and he speaks too slow (Sorry to  Mr.Edmar who maybe reading this at the moment, but its the truth.) For me, Mr.Anjar is the best science teacher. Now that I has to make another E-Portfolio, this blog will be reactivated