Sunday, June 26, 2011
Reflection on issues faced in science
Firstly, I feel that our science lesson is not used to its fullest as Ms.Lim seemed to be able to control only the first half of the class and not the other half sitting at the back who would waste time asking the same questions again and again, wasting precious time, causing the whole class to slow down as a whole, not able to complete the syllabus for the term. I feel that it is the class that is losing out and at the very end, it is our grades which are affected. I think that the teacher could have been stricter with the class and at the same time organise more remedial classes if the syllabus could not be completed, however, not forgetting that not everyone is free on a particular day, therefore, I feel that the teacher should have like two days a week for remedial where the same things are taught so that those who cannot attend the first day can go for the second day or even find out from their friends what they have missed out. Hopefully, from this, we would be able to improve out grades as a whole and live up to our own expections as I noticed that some of us really want to learn but got distracted by the rowdiness of the class. Also, those who are not interested in the remedial can have the will to not go for it so that those who really want to learn would be able to absorb 100% of what the teacher wants to teach.
Experiment on properties of light
This experiment is to prove that light reflected from the mirror is laterally inverted.
Materials:
Pencil
Mirror
Paper
Steps/Procedures:
Firstly, write your name on the paper or draw on the paper. Next, place the mirror upright behind the paper so that you can see the drawing reflected on the mirror. Then, try to trace over the things written on the paper whilst keeping your eyes on the image of the mirror at all times.
Result:
You will find it extremely difficult to trace the things on the paper as the image seen on the mirror is laterally inverted.
Reflections:
I chose to do this simple experiment as kids like us always like to us why does this particular topic or things have these properties. As I am learning light this term, I thought it would be good to prove one of the properties of light: image formed in the mirror is laterally inverted. This experiment is simple but meets its purpose. I hope that this experiment would inspire teachers to do my experiments to prove properties of a particular topic they are teaching so that we students would be able to learn and absorb things faster.
Materials:
Pencil
Mirror
Paper
Steps/Procedures:
Firstly, write your name on the paper or draw on the paper. Next, place the mirror upright behind the paper so that you can see the drawing reflected on the mirror. Then, try to trace over the things written on the paper whilst keeping your eyes on the image of the mirror at all times.
Result:
You will find it extremely difficult to trace the things on the paper as the image seen on the mirror is laterally inverted.
Reflections:
I chose to do this simple experiment as kids like us always like to us why does this particular topic or things have these properties. As I am learning light this term, I thought it would be good to prove one of the properties of light: image formed in the mirror is laterally inverted. This experiment is simple but meets its purpose. I hope that this experiment would inspire teachers to do my experiments to prove properties of a particular topic they are teaching so that we students would be able to learn and absorb things faster.
An experiment on Refraction
Definition: Refraction is the change in direction of a wave due to a change in its speed.
Materials needed:
Coin
Bowl
Water
Steps/Procedure:
First, put the bowl on a table and place the coin into the bowl. Make sure the coin is at the bottom of the bowl. Next, keep looking at the coin while moving backwards slowly until the coin is out of sight. Stand at the same position and get a person to pour water into the bowl.
Result:
One can see the coin at that position now (after adding water).
Explanation: As the water is poured into the bowl, the light is refracted. This made the image of the coin "move up" which enable our eyes to see the coin again, however, this image is virtual as it is not the actually coin we are seeing.
Picture of the diagram:
Reflections:
I chose to do this experiment as firstly, I am learning the topic of light and this is one of the components of it. This experiment is one of the many which show refraction of light but I feel that one would be able to understand the "secret" behind refraction of light best through this simple experiments. I have also seen question on this experiment coming out in my practice papers, thus I was inspired to do this experiment. After doing this experiment, I indeed understand this topic better.
Image from:http://www.wisedude.com/science_engineering/refraction_light.htm
Materials needed:
Coin
Bowl
Water
Steps/Procedure:
First, put the bowl on a table and place the coin into the bowl. Make sure the coin is at the bottom of the bowl. Next, keep looking at the coin while moving backwards slowly until the coin is out of sight. Stand at the same position and get a person to pour water into the bowl.
Result:
One can see the coin at that position now (after adding water).
Explanation: As the water is poured into the bowl, the light is refracted. This made the image of the coin "move up" which enable our eyes to see the coin again, however, this image is virtual as it is not the actually coin we are seeing.
Picture of the diagram:
Reflections:
I chose to do this experiment as firstly, I am learning the topic of light and this is one of the components of it. This experiment is one of the many which show refraction of light but I feel that one would be able to understand the "secret" behind refraction of light best through this simple experiments. I have also seen question on this experiment coming out in my practice papers, thus I was inspired to do this experiment. After doing this experiment, I indeed understand this topic better.
Image from:http://www.wisedude.com/science_engineering/refraction_light.htm
Reflection of Term 2 Science Test
Firstly, I am not happy with my science test results this term. Although I got an A1 for science this term, it is a borderline one and my class ranking for science has also dropped by a lot. I think this may be because I did not really understand the topic Light very well which led to the results not really very satisfying. However, I feel that I have already done my best and it is definitely not last minute preparation this time as I prepared two weeks before the test, meeting my science teacher Ms. Lim at least twice a week during this period of time. Till now, I have not really understood where I have gone wrong as my teacher have not gone through the test. However, I feel that I would be able to do better in the next test and I also learnt that it does not really matters when we prepare for the test, but how much we understand the topics tested.
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