Happy Holidays! | Sunday, February 14, 2010
Happy CNY and Valentine day!
For those poly students, hang in there cause holidays are coming! Do your best for the test. You can do it!
Wishes by
ClarenceLabels: Determination, Examinations
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{5/2 signing off!} Created at 1:06:00 PM
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'O' level result release. | Wednesday, January 7, 2009
The release of the'O' level results will be on 12th Jan 2009. This is confirm by Moe just this afternoon.
More can be found on the Straitstimes website at:http://www.straitstimes.com/Breaking%2BNews/Singapore/Story/STIStory_323066.html
'Students can collect the results from their schools at 2 pm on Jan 12 while private candidates will be informed by post.' As taken from the website above.
Shaking off,
Clarence.Labels: Examinations
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{5/2 signing off!} Created at 6:55:00 PM
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Biology: plants | Friday, September 19, 2008
Hi there! This is the post is all about plants =D for all Bio students! (the minorityof the class)
Ok... lets start with the formulaes..:
1) photosynthesis: carbon dioxide + water -> glucose + oxygen [6CO2 + 6H2O -> C6H12O + 6O2] * [in the presence of (sun)light and chlorophyll] *
_ 2) respiration:
Glucose + Oxygen = Carbon Dioxide + Water + Energy
[C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy]
Ok the common misunderstanding: respiration occurs in plants happens when photosynthesis halts. THIS IS ABSOLUTELY WRONG! respiration is always occurring, to produce energy for the plant. Photosynthesis occurs ONLY in the presence of light and chlorophyll.
Therefore: the typical question of respiration and photosynthesis... a submerged plant is placed under a bright light, after awhile, it is placed in an enclosed room without light. Describe what happens to the oxygen in the water and why. _ If you were to explain it as such: photosynthesis occurs when the plant is under a bright light, thus photosynthesis occurs, the level of carbon dioxide in the water drops and the level of oxygen in the water increases. After the plant was placed in the dark room, respiration takes place and thus the level of oxygen decreases and the level of carbon dioxide increases as photosynthesis does not take place due to the absence of light. _ Seems right? Actually, if this were to be a three mark question, you'd proabably only receive about 1 mark!! why?? because of the way the sentence is phrased. from this, the marker gets the impression that respiration occurs only when the plant is placed in darkness, and the photosynthesis stops. _ So... the right way to phrase the answer is as such: photosynthesis occurs when the plant is under a bright light, thus photosynthesis occurs, the level of carbon dioxide in the water drops and the level of oxygen in the water increases. After the plant was placed in the dark room, respiration continues and thus, the level of oxygen decreases and the level of carbon dioxide increases as photosynthesis does not take place due to the absence of light. _ funny right? with just a difference as minor as that, u lose 2 marks? well with just that change of word, the entire concept of respiration changes. So... in future... be careful of how u phrase ALL your answers, to prevent the opportunity for the marker to deduct marks from your script =)
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Ok now for the transportation in plants: 
Xylem vessels and pholem vessels: xylem vessels transport water throughout the plant, while the pholem vessels transport food throughout the plant.
alright, lets link to other sub-topics.
The regular modified cells:
the xylem vessel is modified in such a way to suit its function. The modifications of the xylem vessels are: a lignified cellulose cell wall(extra hard and strong to support the plant), it is hollow and has no nucleus(it is dead) to enable faster transport of water throughout the plant.
the root hair cell is modified for absorption of water, it has an extended area for larger surface area, its cell sap is so as to lower the water potential in the cell, so that osmosis might occur!
Those were the 2 questions usually asked when it comes to modified cells in plants.
As for the transport in plants, a typical question would be: how does osmosis play a part in the absorption of water in plants.
You probably think that it is active transport that takes place instead of osmosis. and you'd probably be stuck. well you require to understand.. active transport only helps in the transportation of water in plants! By evaporation by the stomata, water is *sucked* up the xylem vessel(Think of the syringe). osmosis has to occur in the absorption of water through the root hair cells. Active transportation does not play a part in it! Osmosis is required to absorp water from the surrounding soil, thus the reason of the high concentration of cell sap in the root hair cells!
This is about all i have to post.. so i hope it helps... Just remember! You shouln't memorise Biology! It just requires understanding and passion!!
Signing off~ Jershon Labels: Examinations
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Mathematics Guide | Tuesday, September 16, 2008
Hope this guide will help you guys to score in mathematics. Also, please give me feedback give you guys find it uncomplete.
Formulas!!!
Volume of cylinder is  HRsq (R is to the power of 2)
Volume of cone is 1/3  HRsq (R is to the power of 2)
Hint to remember it easily- Cone is always 1/3 volume of cylinder, and cylinder is the circle area time its height. This might help u guys to remember.
Now we go on to the surface area of cone and cylinder
Surface area of cylinder
Step 1: We find the circumference of the cylinder  D
Step 2: After that the height of the cylinder mulitple  D. So it  DH
Hint: This is like a rectangle, u find the circumference which is the side, and mulitple the height to find the surface area.
Surface area of a cone is  RL
L is the slanted length of the cone. Sorry this you guys would have to memorise.
Whoa, this is frustrating, I would like to use (pi) to sub for this annoying symbol  !! -------------------------------------------------------------------------------------------------
Now for the Sphere volume _ it is 4/3(pi)r.cub (r is to the power of 3) _
and surface area is 4(pi)r .sq ( ris the power of 2) _ That should be most of the annoying formula you guys have trouble with. _ Volume of pyramid and cube you guys should have no problems with. _ Now Shall we go on to kinematics? Alright lets procede. _ Gradient of speed/time graph is the acceleration of the object. _ Area of speed/time graph is the distance travelled by the object. _ For distance/time graph, it is NOT the case!! _ For distance/time graph the distance is given on the graph. since its distance time graph, u can find speed. _ The gradient and the area of distance/time graph do not represent anything at all. So do not get trick. _ * Also when distance/time graph have a constant gradient, it does not makes it accleration constant. Instead the acceleration is 0 cause there is NO increase in speed since the speed is constant cause distance divide by time is speed. _ Also, if you have any problem in mathematics, post it on the blog, I would try to upload it onto the blog. Feedback is very welcome _ Pardon me if there is alot of grammatical errors. _ Signing off Jiexiang Labels: Examinations
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Prelims Schedule | Monday, August 25, 2008
Dear Class 5/2,
The exams are coming up.. Tomorrow will be the first day of our Prelims..
Starting off the exams with confidence will allow us to have a better hold of the high scores we wish to achieve..
So what are you waiting for? Lets go to that battlefield and GIVE OFF OUR BEST!!
26 Aug (Tues)
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- Social Studies 0915-1045
- Geog2/Hist3 1145-1315
27 Aug (Wed)
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- Sci P2 (Phy/Bio) 0930-1045
- Sci P3 (Chem) 1145-1330
28 Aug (Thur)
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- Lit P1 0915-1045
- Lit P2 1155-1315
08 Sep (Mon)
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- E Maths P1 0845-1045
- Sci P1 1145-1245
09 Sep (Tues)
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- EL P1 0900-1045
- A Maths P1 1145-1345
10 Sep (Wed)
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- E Maths P2 0815-1045
- EL P2 1145-1325
11 Sep (Thur)
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- A Maths P2 0815-1045
- F&N / Art P2 1145-1445
12 Sep (Fri)
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- Sci P4 (Prac) Whole Day (Further Details to be updated)
Yeah! So ALL THE BEST PEOPLE!
Signing off, Joseph!
~If you fail to plan, you plan to fail..~Labels: Examinations
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