This blog is managed by Song Hock Chye, author of Improve Your Thinking Skills in Maths (P1-P3 series), which is published and distributed by EPH.

Saturday, May 31, 2008

Holiday Update - Downtown Toronto, Ontario, Canada

It's not just cold in Toronto, the air is also very dry. That means humidity is low. Guess what happens to the rate of evaporation when humidity is low, students. Remember your science? Yes, the rate of evaporation is higher when humidity is lower.

That is correct. That means your clothes dry faster, and your body loses a lot of water through perspiration. Toronto is the first place I've been where the average daily temperature is around 12 deg C, yet even after drinking over a 2 litres of water, I still feel thirsty. All other cities/countries where I have had to drink lots of water, had average daily temperatures above 30 deg C.

Well, that is Science in action - the lower the humidity, the higher the rate of evaporation.

That's the PSLE Science part. Here is the holiday part. Toronto is a big city. You don't have to miss your home food, because Chinatown in Toronto offers you value for money Asian food and spices. For those who prefer Indian food, there are also many outlets selling such food.

Here is a couple of Toronto photos.

Scenic view of Toronto Harbour View, from CN Tower, the world's highest free standing structure.

Downtown Toronto.

That's all for now.


keentolearn said...

Dear Mr. Song
You have passion in your heart, still thinking about PSLE Science while in Toronto.

We miss your posting very much, but we’ll endure the short term pains. Hopefully, you’ll be back refreshed and recharged to help us in our journey towards PSLE 2008.

Have a well deserved rest. Enjoy your break.

Best Wishes

serena said...

hello sir,
i am a p6 student,sorry to bother you during ur hoilay but psle is only 2 months away and i really need someone teach me maths, know anyone ? please email me your answer at

Excel Eduservice said...

Serena, I have left a message in your email.

confused said...

From Obsever's blog

When a plastic cover was used to cover a hot solid (pies, cakes or iron), water droplets were seen on the underside of the plastic cover. Where did the water droplets come from?

A> The water vapour in the air surrounding the hot solid gained heat and rose. It then condensed to water droplets on the cool underside of the plastic cover.

Note: The water vapour did not come from the hot pies or cakes.
The hot pies or cakes were left to cool down.
Unless heat was applied to the hot pies or cakes, the water content would remain within the pies or cakes.

[For hot liquid, the water vapour came from the hot liquid instead of the surrounding air.

Hi Mr Song

We are confused by Obs's explanation.

In the first case, he put it down to condensation of water vapour from the surrounding air.

In the second case, he explained by for hot liquid, the water vapour came from the hot liquid instead of the surrounding air.

However for both cases, the surrounding air gains heat from the hot cakes or water.

Please help to explain where does the water vapour come from in the first case.