Previous posts on another blog

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.