Properties of Light

Properties of Light includes reflection and refraction of light, as well as lenses. Although light travels in a straight line, reflection and refraction are able to change the direction of light. Reflection is when a ray of light is hits a medium and is "thrown back" in the direction of its source. Refraction is when the ray of light goes through a denser medium and bends. The study of lenses is just a more specific study of refraction. All these are new to me, as I never imagined that light could change direction. It is a really interesting topic and was a real eye-opener to me

Term 3 Science Test

This term, I got 30.5/40 for my test. The topics were Ecology and properties of Light. actually I am quite satisfied with this mark, as I thought the test was quite difficult and I could not get an A1. Also, not as many people in my class got an A1, which translates into an improvement in terms of class ranking. So now I am feeling very happy with myself, although I can still improve more...

Term 2 Science Test

This term, i got 34/40 for my science test. Better than last term, but still not as good as many of my classmates.Although i studied for all my topics for this test, this test I still did not manage to do as well as others due to more carelessness on my part. I failed to check my test because I barely completed my paper in time, and hence I had no time to check my answers. After this test I realised that I need to manage my time better and not spend my time pondering too much on difficult questions.

Term 1 Science Test

In my term 1 science test, i got 32/40, or an A1. however, most of my class also got an A1, and most of them got higher than me. That is saddening. I realised that I did not study the topic acids & bases, and therefore lost many marks on that topic, while those who got higher than me studied that topic, and as a result did better than me in this test. I thought that acids & bases would not be tested, and hence I did not study for them. I learnt that I should revise on all that I learnt in class, regardless of whether or not they would be tested in the test. I focused too much on the test and not on the learning itself.

I also realised that i am very careless in the test. Of all my mistakes during the test, most if not all of them were because i was careless during my test. when i saw them, I thought " why did i put that? i knew the answer yet i wrote something else". i need to be more careful durign my test and check my answers again and look out for errors in my test.

Nuclear Power

The concept of nuclear energy was first thought of by none other than Albert Enstien himself with his famous equation E=MC². It states that the total amount of energy in an object is equal to its mass multiplied by the square of the speed of light. E is energy, M is mass, and C is the speed of light, roughly 3x10^8 m/s. This means that any object has an extremely large amount of energy within them. This forms the basis for nuclear energy and was later adopted into nuclear weapons. Nuclear energy is the process in which a subatomic particle is collided with the nucleus of a radioactive element, usually uranium or plutonium. The impact causes the uranium/plutonium atom to split into two different elements, releasing a large amount of energy and more subatomic particles. These subatomic particles released collide with more atoms, creating an nuclear chain reaction and releasing a huge amount of energy. This same concept is used in nuclear weapons. all the atoms of the radioactive element are compressed by TNT, and a chain reaction occurs. the energy is then released all at once, creating a mushroom cloud.

Nuclear power has limitless potential. But, how we use this great power, for war or for productive energy, is our choice and our choice alone.