Jez's Blog

Why do things sink when everything else is floated? Well, I think it's because that somethings are heaver, or denser than the other things. Things that are heaver or denser will sink, and on the other hand, things that are lighter or less dense will float.

I wonder if 'heaver' can be the other word for 'denser' because from the experiment that we've done in science class, I found out that the pink liquid is actually lighter or less dense than the clear liquid, but the clear liquid is on the layer above the pink liquid, with the yellow liquid in the middle. However, I didn't test if the yellow liquid mattered on keeping the clear liquid on the upper layer, in which I think it does matter. I'd only tested that if there's a larger amount of clear liquid on top of the pink liquid, would it kind of like pressing down the pink liquid and keep it at the bottom, and it does, the clear liquid did keep the pink liquid at the bottom of the graduated cylinder. And what I've been thinking is that when the object has a larger amount than the other object, its density will be more than such object, in which also means heaver?

Anyways, the other part of the experiment that we've done in science class was putting different object into the graduated cylinder with the colour liquids in it (like the picture above), and see what happened. The result was that some objects floated while some other objects sank, and some objects even floated in the middle of the liquids. I think this appearance is due to the density of the liquids and the objects that were thrown into the liquids. I think the reason why certain objects floated to the top of the liquids was because those objects were less dens than the liquids, and for those object that sank directly to the bottom of the liquids were the ones that were denser than the liquids, and moreover, for those objects that floated in the middle of the objects, were the ones that have about the same density with the liquids.

Do I think the mixed liquid will be separated on Monday? Yes, I think it will be separated on Monday. The liquids with less dense will float towards the surface while the denser liquids sink towards the bottom of the graduated cylinder.