啊！！！

惨了惨了惨了~~

考试就快到了！！

我都还没开始读书呢 T.T

给我同班的同学们，如果今天你没注意听课的话，这是bio的提示哦。。。

Paper 3 essay: Chapter 8 and 9

Most probably based on what we did in peka。。。

1. Water pollution


2. Preparation slides of plant cells , and


3. Vitamin C

For paper 3 the essay will be exactly like experiment we did..

There will be guidance, don't worry..

Water Pollution (example):-

Aim : To study/investigate level of pollution in different samples of water

Apparatus:Reagent bottle(with stopper), syringe, stopwatch [this you have to based on the procedure and materials to conclude what you need, this goes for materials as well]

Materials:4 types of water(drain water, distilled water, pond water and lake water),0.1% of methylene blue solution(about 1 ml for each water sample)

Precaution:

1. Do not shake the reagent bottle to take a more accurate reading.


2. Quickly stopper the solution in the reagent bottle to get a more accurate reading.

Varaibles:- Ways to handle variable

Manipulated:Different water samples Use different water sample

Responding:Time taken for m.b.s to decolourise Record the time for m.b.s to decolourise

Fixed:Volume of water sample Fix the volume of water samples at 100ml

*Remember , the shortest time to decolourise is the most polluted*

Procedure:-

K1: Set up apparatus

K2: How you handle manipulated variable

K3: How you handle responding variable

K4: How you handle fixed variable

K5: Precaution

Results/Data: Do table with two columns for the observation of your manipulated variable and responding variable.

Conclusion: Can based on manipulated variable and responding variable/hypothesis.

That's for essay.

*Besides that, remember to read what cause eutrophication, colonisation, enzyme, synthesis and function of organelles and whatever teacher tell us to take note of..

好啦，就到此为止。。。

明天他们有考华语的同学们，加油加油加油！！^^