Monday, August 30, 2010

??/??/10 ICT Session, chemical demonstration.*

As far as I can remember (yeah, well, I can't remember the date)...

We were in the ICT lab learning about chemicals when Mdm Sharizah (our Science teacher) did a little demonstration by mixing some iron fillings and copper sulfate solution. A reaction took place and the filings changed colour.

Mdm Sharizah then conducts another experiment: Mixing Potassium Iodide Solution and Lead Nitrate Solution. The result is a yellow powdery substance that has Lead Iodide and Potassium Nitrate in it.

Good thing I remembered the sites ;P

27/06/10 Special Experimenting (with SENIORS!)*

  1. As far as I can remember...

We did an experiment with the former NASians/Seniors from Temasek Junior Colledge. We did an experiment to see which has sugar, Regular Coke or Coke Zero, and finding how much energy that we burn from eating a peanut, a small cereal flake, or a tidbit.

The first experiment was interesting, we used some of the coke together with some Benedict's Solution to test its sugar concentration. It seemed like the Coke Zero did not change colour (sugar-free) but the Regular Coke did (yep, lots of sugar) during the experiment.

The second one involves heating the item until it catches fire. That's right! We burned the peanut, the cereal flake and the tidbit, one by one. At the same time we measured the temperature to see how much energy it burns. I had the "burning sensation"

Before ending this post, I...
  • ..have 3 thoughts:
  1. The food we eat seems appetizing and may not affect our health gradually but, from this experiment, I learnt that food cannot be judged by just its looks and thoughts. It needs to be proven how healthy it is.
  2. Food that tastes, feels, looks the same may seem the same but who knows? Different food of the same characteristics can have different amounts of sugars, fats etc.
  3. I think that the seniors our very good presenters. Despite the huge fuss the class made, they were still able to learn and experience.
  • ...have 2 questions:
  1. Is there a better way to find out the properties of the food without the use of too much experimenting?
  2. How will people make food taste so nice without the use of sugar and unhealthy food properties
  • ...have a useful applications
  1. I could use it for HE (Home Economics) to make a very healthy meal.

??/06/10 (I think) Experimenting.*

As far as I can remember...

Well... we did 2 experiments, now did we? Me and Yi Heng did an experiment about what happens if we burn a magnesium strip and one about re-lighting a burnt splint using a chemical reaction. It was very interesting indeed. The magnesium strip glowed very bright and the splint re-lit itself on our second try. I learnt that a chemical reaction forms a new substance. I wonder how many possible reactions can be made. It can be a one huge chart of it! I have observed a lot!

The Intro

Hai, this will be my science blog for my class 1R7. This will be used for reflection and not for personal use (I think).

I have decided though on how I organise this blog:

  • I will try to posting everyday, but not guaranteed everyday
  • I will try to include as much as I can
  • Posts will include refections, what I think, what I wonder... wait... um... what I learnt and... uh... just like I say, as much as I can!
  • Posts marked by (*) are marked as previous dates and late for submission. I apoplogise for those though :"(
Now that I'm done, proceed with the blog!

Note: As the laws says (or what they say), plagiarism is against the copyright law and the law itself. Special permission is need for use of this blog for resource purposes.