Natural Disasters

On 23 September, in English class,  asked to make a presentation about Natural Disasters. I was paired up with Michael and we were presenting about Meteors.

Here's the presentation we did Meteors

Movement of Substances

On Biology, we learned about Diffusion and Osmosis. Last Monday (30 September 2013) We were asked to bring one big potato and cut it into 0.5cm x 6.0cm long cylindrical strips.

We fill five Petri Dish which contain Sucrose Solution with different concentration and one Petri Dish with Distilled Water. We had to ensure that the potato strips are completely submerged in the solution and waited for 20 minutes.

After 20 minutes, take out the potato strips and measured the length. The potato strips will increase and decrease. It's because of Osmosis.