Friday, February 6, 2009

Chandel Tan

Hello people:)

so it's finally my turn to blog about my geog reflections. it's kind of pressurising seeing how the previous 3 people all had uber long blog posts. HAHA. i shall try to make it long. and well, easy to digest. ok. so here goes:

today, we talked about THERMODYNAMIC EQUILIBRIUM, meaning that whatever heat gained from the sun to the earth will be the same amount as whatever heat lost.

we also had this really really short discussion on how heat transfer is made up of 3 mediums - conduction, convection and radiation. yes yes, i know we've already learnt that in sec 2.

Also, we touched on the electromagnetic spectrum, a 'bar' made up of the colours of the rainbow. so how do you actually intepret the electromagnetic spectrum? well, the lower the energy rays, the longer the wavelength on the spectrum. and as you all know, the coulours of the rainbow are in this order: RED, ORANGE, YELLOW, GREEN, BLUE, INDIGO, VIOLET.. yes.. so any wavelengths longer that the RED coloured part will be hereby known as INFRARED RAYS. (like how phones used to have infrared.. but i think these phones are pretty outdated already) and.. wavelengths shorter than the VIOLET coloured part are known as ULTRAVIOLET RAYS..

just for your information, heat gained from the sun is know as short wave radiation (which also symbolises a gain in heat on earth's surface). and heat produced from the earth is also called long wave radiation.. (meaning that heat is lost from earth)

apart from these facts, we also learnt to draw the diagram to depict the global shortwave radiation cascade. although it was pretty confusing in the beginning, we soon learnt the method of drawing the diagrams. the trick, however, is simply to read the instructions step by step. Personally, i feel that this simple method does wonders when one is truly clueless and confused as you are taken to approach the problem a step at a time. for example, in math, you don't usually go straight into the final statement and come up with the answer. you analyse it, then you try to find the right formula or something. then you solve. haha. yes.. it's the same thing for drawing of such diagrams.

we also did some group work during the lesson today, since we were made to come up with a diagram as a group. so we had some interaction with our classmates during geog lesson today. I have to say that many brains put together far surpasses a sole opinion since i not only clarified my doubts of the diagram's concept with daryl, but also managed to see how the diagram should more or less look like, since each of us contributed in one way or another during the illustrating of the diagram. Should I have tried to attempt it all by myself, I would not have cleared the question in my head, and might not even have figured out how the diagram should have been drawn.

In a nutshell, within today's 1 hour period, I not only acquired new knowledge, but also realised the importance of going a step at a time to acheive utmost success, and also how crucial it is to work as a team. I learnt a lot indeed.

Comments: (here, name at bottom)

1 Comments:

Anonymous Victoria Lim said...

Yeah, thermodynamic equilibrium is an integral part of nature. This is as the insolation affects many many things.
It affects the winds, as increased temperature in one area compared to another results in differences in pressure which gives rise to convectional currents, giving us wind. Wind will blow clouds, affect their formation, and thus deciding where the rain falls. This causes some areas to be wetter than others, resulting in varying kinds of vegetation and new ecosystems (as where there's water on earth, there's life). Overall it affects the climate and weather. Not to mention, the seasons as well.
Temperatures affect so many things. With global temperatures rising as a result of increased CO2 levels, we can thus foresee that many aspects of the Earth will undergo changes. Already, we can see instances of freaky weather - winters lasting more than it should, heat waves affecting an increasing number of countries...
Yet, Earth is a balance of interconnected systems. So intricate that one effect might have many causes, and one cause might have many effects. The rising amount of CO2 levels will throw the thermodynamic equilibrium off balance, and with that many other interconnected systems too. What we now experience may merely be the tip of the iceberg.

May 31, 2009 at 9:08 PM  

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