Science
E-Port Folio~
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My name's Jingrong. Welcome to my Science E-Port Folio! Science is extremely interesting if you get to know more about it! Anyway, I'm from HCI 1A1'10. Hope you enjoy my E-Port Folio!
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Jiong Wei
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Science Tricks
This is the video on science tricks that are magical yet scientific :D
I like the last trick the most, it being the newest and coolest to me. Who would have ever thought that lifting the match like how the performer did could be possible? I wouldn't have thought about that! If I was asked, I would never try to light the match at the center of the matchstick. I would have thought that it would either go down or up. If it heads down, I thought it will burn the box. If it heads up, I thought that the matchstick would both be just lighted and not that the matchstick would be burnt! Science is indeed interesting and we can play with science to create magical acts that can make other fall for it. I hope you've enjoyed the video :)
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Pressure
Hi :D As we all know, pressure is related to force. I always thought that pressure was just the amount of force applied whatsoever, and never thought further into it. That was before I learnt more about pressure this year. Turns out, pressure is higher when a smaller area is in contact with the surface area of another thing, while a smaller pressure is applied when a larger area is in contact with another thing. For example, when one walks on sand at the beach, no one (women/ girls) would want to wear high heels there. I am sure very little of us would think about the reason when this topic is randomly spoken up. Come to think of it, one would sink in the sand when wearing heels. That's because the high heels has a very small area in contact with the sand at the back of the shoe. So, one will sink down due to the millions of pascal. <------Now how do we measure that? 1st, we take the weight of the person wearing the high heels - for example, 600N. Then, we divide 600N by the surface area in contact with the sand ( the long pointed stick at the end of a high heel). In most cases, 1cm x 1cm will be the closest estimate for the area. So, 600N ÷ (1cm x 1cm) = 600N ÷ (0.01m x 0.01m) = 6 000 000Pa! Think how painful it will be if someone steps on you with a high heel!
Also, why are magicians able to lie on a bed of nails without being pierced through his or her body? Of course, it's the same logic! The force of the nails on the bed is spread out all over the entire body, causing lesser force to be acting on the magician when he is lying down on the bed. I would never have known how magicians can lie down on a bed with nails if I didn't come across this science topic.
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SCIENCE CAMP :D
I went to a science camp on 7th June and 8th June. Sadly, it was only 2 days 1 night ): I was really looking forward for the experiments and games for the science camp held at Republic Polytechnic(RP). RP is extremely huge in it's land. I've also gone there when I was P5 for a talk on PSLE. This time, the science camp was seriously very fun! The science experiments were of higher levels but they were interesting and fun. Although it was hard to understand, it sure was enriching and nice to have a feel of other experiments, other than the normal ones we have in school. There was DNA testing etc. DNA testing was the main experiment or theme. There were dusting for fingerprints, blood DNA ( not real blood just a liquid that seemed to be blood but not just red water or normal things. It smelt of strawberry.) The food varied but consisted mostly of chicken, meat and rice. When going for bath at night, things were complicated to the maximum... We - Hwa Chong(HCI) students, were reprimanded for rushing to the toilet. Then some person or people were telling us to get out of the toilet when we were in the middle of bathing. The route to and fro from the sleeping area and the toilet was almost like walking from the SALT Centre to the College Section of HCI. More experiments were held and there was an amazing race before we went to bathe. This arrangement was much better than the camp in ST John's island since we were supposed to bathe at 5pm then and head for more night activities in ST John's island. Anyway, the amazing race was fun :) We dashed here and there but it was air-conditioned so it was alright :) The next day was a little experiment and also the end of camp talk. I really feel sad that it was only 2 days 1 night. I really enjoyed it a lot. I hope to attend this camp again soon.
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Chromatography
We did another experiment on separation techniques - Chromatography. It was the separation of the ink. This was an individual experiment. 1st, we each received a strip of filter paper and were told to draw a line with a pencil then use a black pen to make a dot - a fat dot, not just a normal full-stop, on the line. Then we placed the filter paper in the test tube which contained ethanol. The ethanol was less than 1/4 of the test tube. A stopper was placed at the top and we left it there to observe the chromatography acting on the ink. Javier accidentally drew the line with his black pen and his chromatography turned out extremely nice and clear due to the huge amount of ink. It was a mountain filled with Blue, Yellow, Purple. It was interesting to find out that many colours existed in black or other colours! I would love to find out more about colours or ink or separation techniques. I really hope to learn more of such interesting things.
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Science Eureka Sabbatical :)
I attended Science Eureka as a sabbatical for Term 2 :D It was very enriching and interesting, giving me new knowledge that was very fascinating. There were experiments on all 5 days, which included Physics, Chemistry etc :D To me, Chemistry seemed the best, perhaps it's due to the experiments. The experiments were much more interesting in a way or two. Almost all the experiments or the 5 days were based on group work except for 1 or 2. It was definitely fun working with my friends, figuring or finding out more scientific knowledge. We learnt about light - in the water, curved. Electricity - Making a spinning battery with just a magnet, a battery and wires. There were also many other fun experiments for us to do. There were also contests held like a bridge building with only a limited amount of ice-cream sticks and a bottle of glue. The motive of building this bridge was to see whose bridge could hold the most amount of load. My group never expected to win, but we still emerged as champions for the bridge building contest. Our maximum load was more than twice of the 2nd winning group. There was also an egg parachute which, everyone had the same score. We spent loads of time building that parachute. The materials given were: String, Egg, Styrofoam Cup, Newspaper, Scotch Tape, A Needle. We were obviously given a limited time, which was 1-2 hours. Then, we would go up to the 4th level and drop them down for the others to pick up below. Our egg dropped into the drain, but it didn't break. There was a group who had one thin piece of huge newspaper as the parachute. Many of us thought that it would break or fail in the process of throwing the parachute, however, it was the best, not touching the wall or anything else other than the grass. It really is indeed shocking to find out strange facts about science when we actually experiment things out instead of just thinking them in the head. No groups' egg was spoilt, therefore everyone got the same marks. There was a contest for storing ice. We were given some straws, scotch tape, newspaper. We were supposed to keep an ice in the box or what we made for more than an hour. Our ice completely melted, and we were the 1st from the last... Some groups managed to keep the ice in a solid form, solid - but not in the same state as about half of it melted. I would love to attend Science Eureka as my Sabbatical next time for more experiments.
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Dry water ?·.·?
The article I will be sharing can be found here:
http://www.sciencedaily.com/releases/2010/08/100825174102.htm
It is about the newly found ‘dry water’, which could save the Earth from global warming.
Dry water is something like powdered sugar, except that it stores carbon dioxide as another way to fight global warming. I didn’t know the existence of dry water; neither did I know that it can actually store carbon dioxide! I always thought that drugs with ‘dry’ in front of it, like ‘dry ice’, would be harmful to us in one way or another. However, I was wrong. Dry water proved me wrong and could actually save everyone and our younger generations from global warming. It was also an energy-efficient way of starting chemical reactions used to make other consumer products. According to the website, dry water could store or transport potentially harmful industrial products too! Wow, dry water is completely different from dry ice! Dry water is very useful to the Earth, and also not harmful against humans, whereas dry ice is completely harmful against humans. Dry water contains 95% of water but is in a powder form. That was why it was called dry water. Scientists suggested that dry water was able to absorb large amounts of carbon dioxide compared to other products as a hydrate, and was useful in fight global warming. I hope dry water will be able to stop or reduce global warming, allowing younger generations to live like how we used to, in the constant climate areas instead of our constantly changing climate area now. This multi-purposes dry water could safely and conveniently store fuel methane in vehicles powered by natural gas. Sadly to say, a great amount of effort and work must be put into in order to reach the above state. The scientists and professors are currently seeking for more collaboration to further develop the studies of this awesome drug or product, which could be our chance to defeat global warming. Let’s hope that dry water will succeed in everything it is able to do for humans! : )
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Smart, eco-friendly ants :)
The article I am going to share can be found here :
http://www.sciencedaily.com/releases/2010/08/100826122629.htm
It is about ants using antibiotics as weed killers.
The ants used antibiotics to inhibit the growth of unwanted fungi and bacteria, in their fungi creatures which is used to feed their larvae and the Queen Ant. These antibiotics are produced by a bacteria the lives on the ants in a mutual symbiosis. I never knew that antibiotics could exist on animals or insects! Though these ants were studied for a century, it was only discovered recently that these ants used the antibiotics. I am guessing that the ants either only started using the antibiotics recently, or the researchers were not paying full attention to the ants’ behaviour. Dr Hutching researched on Acromyrmex octospinosus leaf cutter ant, finding out that these species of ants create the largest and also complicated animal societies on earth which includes several millions of individuals. I am fascinated with the information researches got from all their hard work. I’m sure many would love to become researchers after reading such interesting science articles. Ants not only evolved agriculture before humans do, but also combines therapy with the natural antibiotics. Yet, humans are only starting to realise that the above statement is one way to decrease the rate of drug resistant bacteria. I would never have thought that ants would be so smarter and faster than the way or speed of how humans work or do, based on the difference in size. Turns out, I’ve learnt something important, that is never judge a book by its cover, no matter how convincing it is.
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