These are the previous posts on other blogs for the same purpose. Due to technical difficulties, I had to change to this one.
Lab Lesson 2:
A few weeks ago, we had our second lab lesson, where we got to perform some simple and fun experiments with several chemicals.The first experiment was the best. We poured some vinegar into a test tube and added sodium bicarbonate to it, which resulted in a chemical reaction, pounding the solution out of the apparatus at a relentless jet. It was so cool!The second experiment involves pouring water into two test tubes, then adding sodium carbonate to one and copper sulfate to the other. When the contents of the second test tube was added with the contents of the first, the liquid solidified to form a blue solution.The rest of the experiments were done in Primary School before, like blowing into limewater with a straw, adding iodine solution to starch etc.I hope that the teachers will let us do more of such experiments and not just use worksheets all the time.
IT home learning answers (T1)
Q: Why and how did the density of water change when salt was added to it?A: Since Density = mass/volume, so addition of salt means increase in matter (which means increase in mass), so higher mass/same volume = higher density.Q: Explain why the egg sunk in tap water but floated in salt water.A: The density of the egg was higher than that of water, so it sunk. But the density of saltwater was higher than that of the egg, that's why the egg floated.
Friday, April 30, 2010
Discussion Topics (LSS ACE)
Our science teacher discussed about gravity and suggested a discussion topic: Why are we heavier at the equator?
However, research on the Internet said that we are actually lighter at the equatorial regions than we would be at the poles. This, of course, is due to gravity. The Earth is not a perfect sphere, it is wider at the sides because it is rotating. Our planet's equatorial radius is 22km longer than the radi of the poles. When we are at the poles, we are slightly nearer to Earth's core than we are at the equator. Gravity reduces as distance increases and although this is very small it is a contributing factor. So you would be lighter by about 0.5% when you are at the equator as compared to when you are at the poles.
http://uk.answers.yahoo.com/question/index?qid=20080930080807AAvrnAd
http://www.funtrivia.com/askft/Question25977.html
http://wiki.answers.com/Q/Will_you_weigh_the_same_amount_at_the_equator_as_at_the_North_or_South_Pole&alreadyAsked=1&rtitle=Why_does_an_object_weighs_more_than_it_does_in_the_north_pole_then_the_equator
However, research on the Internet said that we are actually lighter at the equatorial regions than we would be at the poles. This, of course, is due to gravity. The Earth is not a perfect sphere, it is wider at the sides because it is rotating. Our planet's equatorial radius is 22km longer than the radi of the poles. When we are at the poles, we are slightly nearer to Earth's core than we are at the equator. Gravity reduces as distance increases and although this is very small it is a contributing factor. So you would be lighter by about 0.5% when you are at the equator as compared to when you are at the poles.
http://uk.answers.yahoo.com/question/index?qid=20080930080807AAvrnAd
http://www.funtrivia.com/askft/Question25977.html
http://wiki.answers.com/Q/Will_you_weigh_the_same_amount_at_the_equator_as_at_the_North_or_South_Pole&alreadyAsked=1&rtitle=Why_does_an_object_weighs_more_than_it_does_in_the_north_pole_then_the_equator
Saturday, April 17, 2010
My Biggest Science-Related Project yet
My school hosts Projects Day Competitions annually, to enhance our research skills and independence. It is compulsory for Lower Secondary students like me, and it is also computated in our results as part of a subject called Independent Studies. There are 9 categories to choose from in this Competition, each with different judging criteria. The categories cover most of the core subjects taught in school, ranging from Science to Art.
My group decided on Category 1: Experimental Research. This category is science-related, to create a hypothesis then prove it with an experiment. However, this experiment must either not have been performed before, or be unique among the related experiments performed before. Our project is entitled "Music for Animals". We want to find out the behavioural and psychological effects music have on animals, and use this to allow animal owners to change their animals' personality to suit their preferences, or to calm an aggressive and hyperactive animal down.
What makes our project unique, is that we will not use mammals. Many researchers have conducted this experiment on mammals and not other orders, not even birds. Furthermore, exotic pets like chameleons, macaws and tarantulas are getting very popular in countries like the U.S. and the U.K. (sadly, Singapore bans these). By using non-mammals (we would be using red-eared sliders and budgies), the information collected may apply for other animals of the same family, thus solving behaviour problems on a wider range of animals.
I hope that the animals will cooperate with us and make our project a success.
My group decided on Category 1: Experimental Research. This category is science-related, to create a hypothesis then prove it with an experiment. However, this experiment must either not have been performed before, or be unique among the related experiments performed before. Our project is entitled "Music for Animals". We want to find out the behavioural and psychological effects music have on animals, and use this to allow animal owners to change their animals' personality to suit their preferences, or to calm an aggressive and hyperactive animal down.
What makes our project unique, is that we will not use mammals. Many researchers have conducted this experiment on mammals and not other orders, not even birds. Furthermore, exotic pets like chameleons, macaws and tarantulas are getting very popular in countries like the U.S. and the U.K. (sadly, Singapore bans these). By using non-mammals (we would be using red-eared sliders and budgies), the information collected may apply for other animals of the same family, thus solving behaviour problems on a wider range of animals.
I hope that the animals will cooperate with us and make our project a success.
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