Science Practice 1
The melting point of W is -10 degree Celsius.
Question 8 is on solar system. Please do not do.
Should you have any question, please list it here under "comments" and I'll edit this page.
Regards,
Mr Wan
posted by Allan at
3:12 PM
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2 Comments
Dear 6D pupils,
It's quite disappointing that some of you have not adopted a good attitude for PSLE, lazing around during lessons, laughing and joking with friends when the teacher's talking.
I'm a direct person. If you don't like the lessons, please do not affect those around you who do or are just too polite to decline talking to you. Spare a thought for others.
I'm having a bad throat problem that refuses to go away. I appreciate those who show more concern by keeping the noise level down. As for those who don't, I don't need you to care about my condition, but please spare a thought for those who want to ask questions and those who want to learn.
Then again, there are several others who have stepped up their gears. A good sign, in particular, is Yi Wei. If you remember last year and early this year, Yi Wei gets treatment worse than a dog from me. Now, he may not be scoring well for practices, he has certainly adjusted his attitude positively.
Then, there are also Yi Ze and Jin Jie, who are aware of their standards and have been keeping their attitude positive all along. 6D is a challenging environment for them two. I have my words of encouragement for both of you:
"You may not be the best in the class, but you are the best in my eyes and I'm proud of you. Keep it up!"
The girls in 6D are the least worrying. Since P5, about 90% of them are constantly diligent. Even Mdm Maisarah often praised you in front of me. You're good and I don't intend to take your attitude for granted. Thank you, girls, for being so wonderful in learning. We appreciate your efforts.
If you realise about Yun Ling's, Yu Rong's and Michelle's body languages, you'll notice that my homework is not enough for them. I feel sorry for you. You're great students. People may call you freaks, but you're GREAT. I'd like to become a freak if this is what freaks are like. Try oldscool.com.sg to work on more questions or try the old questions in Math Weekly.
I apologise for the lack of mock exams. As much as I love to arrange one, we're restrained by availability of venue and I'm also caught up with many personal matters, which I'm still struggling with.
Don't worry for me as I won't shortchange you in your PSLE preparations. I just want those who are in top gear in learning attitude to continue so. Don't over-do it, don't let your flame douse. Keep it in balance and you'll reap what you sow soon.
Here's a little reward on the picture of the iceberg that is floating away from Greenland. It's 1/3 the size of Singapore. This is the reality behind Global Warming.
I wish you luck in your upcoming PSLE examinations and prelims.Best of luck,
Mr Wan
posted by Allan at
10:58 PM
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0 Comments
By Agence France-Presse, Updated: 16/08/2010
Facebook scammers spreading fake 'Dislike' button
Computer security firm Sophos on Monday warned that scammers are duping Facebook users with a bogus "Dislike" button that slips malicious software onto machines.
Facebook scammers spreading fake 'Dislike' button
There is no "Dislike" version of the "Like" icon that members of the world's top social networking website use to endorse online comments, stories, pictures or other content shared with friends.
Hackers are enticing Facebook users to install an application pitched as a "Dislike" button that jokingly notifies contacts at the social networking service "now I can dislike all of your dumb posts."
Once granted permission to access a Facebook user's profile, the application pumps out spam from the account and spreads itself by inviting the person's friends to get the button, according to Sophos.
The ruse was described as the latest in an ongoing stream of tricks that includes baiting booby-trapped links with messages including "the biggest and scariest snake" and "world's worst McDonald's customer."
posted by 6 Diligence at
7:40 PM
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1 Comments
I found the video on youtube, although it's quite blurry.
posted by `[x] imLYDIA {: ♥ at
3:26 PM
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0 Comments
Mr Wan, my workings are like this:
Boy Girl
1st Day 100% 100%-600
2nd Day 89% 117%-(600/100 X 117)
89% 117%-702(< Not sure if its 702 but around there)
So I take the 2nd day + 702, then divide by the percentage. Then find 100% so 3 steps
posted by 6 Diligence at
5:08 PM
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0 Comments
Sorry Mr Wan for not finishing my Maths Paper 2 in time. I did not finish it as I had thought that it was due on Monday. I promise that I would not let this happen again.In future, I will write down the homework on my planner and the day it is due.
By : Ong Jin Jie
JJ
posted by 6 Diligence at
11:33 AM
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0 Comments
Sorry Mr Wan for not writing my name on the foolscap paper. I always rush to do my work and once I am done, I would keep it and forget to the my name. I promise I WILL write my name before I start doing to prevent this from happening again. I hope you will forgive me.
Signing off
-Jonny Careless Wong
posted by 6 Diligence at
4:06 PM
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0 Comments
Sorry Mr Wan for not writing my name on my
homework. I usually do my homework on fullscape before writing
My name. I am so sorry for making people search
for the works' owner, which is me. I promise this
would not happen again
Ivan Lim
6Diligence
posted by 6 Diligence at
2:49 PM
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0 Comments
Dear Mr Wan,
posted by 6 Diligence at
2:17 PM
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0 Comments
I've just watched a Nat Geo Wild documentary on "Triumph of Life".
I've finally gotten the name of the Vampire Bird. It's called the mocking bird.
It has semi-long (about 5 to 6 cm), semi-sharp beak meant for pecking of seeds as its diet is on seeds.
Unlike most birds which get their source of water from fish (blood), the mocking bird has no source for water as it is residing on a faraway island. Hence, a few behavioural adaptations kick in:
1) It looks for abandoned eggs, pecks it to get water. It also realises that eggs are rich in nutrients.
2) As the number of abandoned eggs is limited and living things need water daily, it looks for other sources: the sea iguana. It starts eating the ticks on sea iguanas for water (blood as ticks suck blood). It accidentally pecks on the skin and causes a wound. Soon, it realises that wounds are a rich source of blood.
3) Not all animals have wounds and its water source runs dry again. Hence, it begins to peck wounds on other animals like birds for blood.
An interesting development whereby the purpose is "look for water".
Hope you enjoy this as much as I had.
Regards,
Mr Wan
posted by Allan at
8:08 PM
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0 Comments
Jul 31, 2010
Ocean plant plankton in big decline
They play vital role in producing oxygen and removing carbon dioxide
These marine diatom cells are an important group of phytoplankton found in the oceans. A probable cause of the sharp decline in their numbers is global warming, which makes it hard for the plant plankton to get vital nutrients, researchers say. -- PHOTO: ASSOCIATED PRESS
They also are declining sharply.
Worldwide phytoplankton levels are down 40 per cent since the 1950s, according to a study published this week in the Nature journal.
The probable cause is global warming, which makes it hard for the plant plankton to get vital nutrients, researchers say.
The numbers are both staggering and disturbing, say the Canadian scientists who did the study and a top
'It's concerning because phytoplankton is the basic currency for everything going on in the ocean,' said
'It's almost like a recession... that has been going on for decades.'
Half a million datapoints dating to 1899 show that plant plankton levels in almost all the world's oceans started to drop in the 1950s. The biggest changes are in the Arctic, southern and equatorial
Dr Virginia Burkett, the chief climate change scientist for the US Geological Survey, said plankton numbers are worrisome and show problems that cannot be seen just by watching bigger and more charismatic species like dolphins or whales.
'These tiny species are indicating that large-scale changes in the ocean are affecting the primary productivity of the planet,' said Dr Burkett, who was not involved in the study.
When plant plankton numbers plummet, as they do during El Nino climate cycles, sea birds and marine mammals starve and die in huge numbers, experts said.
'Phytoplankton ultimately affects all of us in our daily lives,' said marine ecology researcher and lead author Daniel Boyce, also a professor at
'Phytoplankton... produce half of the oxygen we breathe, draw down surface carbon dioxide, and ultimately support all of our fisheries,' he said.
'An ocean with less phytoplankton will function differently.'
Plant plankton - some of it visible, some microscopic - help keep Earth cool. They take carbon dioxide, the key greenhouse gas, out of the air to keep the world from getting even warmer.
Professor Worm said that when the surface of the ocean gets warmer, the warm water at the top does not mix as easily with the cooler water below.
That makes it more difficult for the plant plankton, which are light and often live near the ocean surface, to get nutrients in deeper, cooler water.
It also matches other global warming trends, with the biggest effects at the poles and around the equator.
Previous plankton research has relied mostly on satellite data that goes back only to 1978. But Prof Worm and his colleagues used a low-tech method - disks devised by
The murkier the waters, the more plankton there is.
Prof Boyce says phytoplankton are similar to plants like grass and trees.
'Phytoplankton are basically like microscopic little plants. They require sunlight and nutrients in order to grow,' he told ABC News.
'Changes in their abundance will ultimately affect everything in the ecosystem, from tiny little zooplankton all the way up to fish and whales and ultimately humans,' he said.
ASSOCIATED PRESS
posted by Allan at
11:06 PM
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0 Comments
Mr Wan, I am sorry that I have given you so lousy corrections. I could not concentrate in class as Azril and Peh Shin was talking. They were also taking my pens and playing with them. I promise I will not do this again. I will sit in on front to listen or ask them to keep quit. I hope you will forgive me as I am sincerely sorry.
-Jonny Careless
posted by 6 Diligence at
7:26 PM
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0 Comments
Sorry that i did not put in effort in doing my corrections. I will not do it again as i know that it is wrong to not do corrections. I did not do corrections that day because i did not do a few pages of homework so during the lesson, i do some of the question and did not pay attention in your lesson. i will do my homework before deadline in future.
zi jun
posted by Zi Jun at
9:59 AM
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0 Comments
I am very sorry for not doing the corrections. During the science lessons while you were going through the questions, I thought some of my answers were correct so I handed it in for marking. But I missed the some other points which I did not write in. From now on, I will check my work before handing it in for marking the corrections.
posted by 6 Diligence at
8:14 PM
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2 Comments