Tilt and Shape: Season 2 (27th Feb)
Hello.
Sorry for the delay in posting. It's basically the same as mak's, but probably not so defined and content-based. Because i wasn't in school for that lesson, and the rest of the class wasn't sure about it anyway. Hence, we revised everything again for this lesson. By the way, could someone help me explain how autumn and spring come about and how are they different? Sorry, I didn't get it and it wasn't really explained in class that day. Thanks!
Why are there seasons?
Seasons occur due to the Earth’s tilt.
Note: Radiation from the sun does not weaken with distance. It only gets cooler when the distance between you and the sun is larger as the radiation is spread over a bigger area and is thus less intense. So, when explaining about the sun’s rays, cannot write hotter/colder.
1. As the Earth is so huge, a small tilt in the Earth’s axis will result in a change of distance between the Sun and each hemisphere. Hence, when the northern hemisphere is inclined towards the sun, meaning it is nearer the sun, the Sun’s rays are/solar radiation is more intense on the northern hemisphere, hence it experiences summer. They/it are/is less intense on the southern hemisphere, as it is further away from the sun, thus it undergoes winter.
3. The southern hemisphere is inclined towards the sun, meaning it is nearer the sun, so the Sun’s rays are/solar radiation is more intense on the southern hemisphere, hence it experiences summer. They/it are/is less intense on the northern hemisphere as it is further away from the sun, thus it undergoes winter.
Explain the distribution of Earth’s Climate.
Basically everything is explained in the diagram. Hence, the content seems very little, haha. Anyway, pardon my messy handwriting(:
I feel that this lesson was quite informative, as I've never known that the world's climate was brought about by the movement of air within the atmosphere. I've not looked at it as a whole system before, only from certain segments, like the water cycle. Therefore, this lesson enabled me to appreciate the big picture and how it all works out. Also, it's interesting to know that deserts are not found at the hottest area on Earth,the equator, where one would naturally expect deserts to be at. That's one point to note. Another thing, I knew that seasons were caused by the tilt of the Earth, however I did not really know how they were actually brought about. Hence, this lesson provided alot of details and explanations that added to my existing knowledge and allowed me to understand the topic more thoroughly.
The End.
- Jia Yi
posted by 08IP04/JH404 @ 8:50 AM
5 Comments:
HI JIAYI! I like your diagrams, they're colourful! And yes, thanks for correcting my diagram which is wrong. So 04, you all can leave my triple-cell diagram alone and refer to Jiayi's. :D
Ps. Please work faster, Jia. Good night.
About the difference from autumn and spring.
Well, from what I understood, one explanation is that spring is a transition from winter and summer (when it gets warmer), and autumn is a transition from summer to winter (when it gets cooler). So, actually spring and autumn are just definitions for 'season where it gets warmer' and 'season where it gets cooler'.
Yi Sin
By the way, Pei Xin also explained about the sun moving from the Tropic of Cancer to the Tropic of Capricorn and back again (which should be the actual scientific explanantion, and not all that definition nonsense). Because of the Earth's tilt, as the Earth revolves around the Sun, the area where the Sun's rays are concentrated will move too. It begins on the Tropic of Cancer on the summer solstice, and moves towards the Equator. When it is at the Equator, it's the autumn equinox. Then it continues moving until it reaches the Tropic of Capricorn, which is when the winter solstice occurs. It moves back to the Equator (spring equinox), and back to the Tropic of Cancer, at the summer solstice again. (By the way, the above solstices and equinoxes are based on the Northern Hemisphere).
The way I remember it is, when the Sun's rays are in the northern hemisphere, it's summer/spring-ish in the north (winter/autumn-ish in the south), and vice versa. So if you didn't understand this whole paragraph of verbal diarrhoea, just read the last paragraph. (By the way, all this is illustrated by Jia Yi's diagram)
By the way, I posted the above comment.
Yi Sin
Yes, I agree that Ms Lim's explaination is more details. However, actually there is no different between these two explainations. At exactly mid-spring and mid-autumn, the weather should be about the same (equally distribution of solar radiation between Northern and Southern Hemispheres).
Linking back to Ms Lim's question, whether the weather feels different when you are living in spring and autumn. Since the ending of autumn and beginning of spring should be about the same and vice versa, we still have to link back to the definition of 'season where it gets warmer' and 'season where it gets cooler' to decide whether it is spring or autumn.
And one more thing, I notice the climate at of region does not depend solely on the latitude it is located, but also on other conditions, the height for example. That is why the Himalaya region at about 30 degree latitude to has the Polar tundra climate.
Jenny.
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