Scientific experiment-magic toothpick

Composition topic: scientific experiment-magic toothpick

Keywords: toothpick magic primary school grade four

This article applies to: the fourth grade of primary school.

Composition source:

This composition is about the fourth grade of primary school. The title is "Scientific Experiment-Magic Toothpick". Everyone is welcome to contribute enthusiastically.

Scientific experiment-magic toothpick

This morning, it suddenly occurred to me: I want to do a small scientific experiment, too! So, I searched the words "scientific experiment" on the Internet. Seeing the words "magic toothpick", I thought: What's magical about toothpicks? I want to see how amazing it is.

So, I started this experiment. I first filled a basin of water with my mother's washbasin, and then I found some toothpicks. I put the toothpick in the water first. Ah, the toothpick is heavy! Oh! The first experiment failed. I changed a pot of water and a toothpick, thinking: it should be all right this time. This time, I carefully put the toothpick on the water and saw: Great, my toothpick didn't sink! I jumped for joy, but I accidentally sank the toothpick again. Unfortunately, it failed this time.

After two failures, I was a little discouraged, but I thought: no, no, success is for those who persist, and failure is for those who give up. I pulled myself together and started the experiment again.

I am very, very careful this time for fear of making a mistake. I put the toothpick on the water again, and this time it floated up again, but I didn't cheer like last time. I know I must not be extremely happy, so I must be careful. I put the sugar cube far away from the toothpick. I watched carefully and found that the toothpick was getting closer and closer to the sugar cube.

I emptied the basin of water, replaced it with a new one and put the toothpick in as usual. Ah, the toothpick sank with too much force. I carefully put the toothpick on the water and put a bar of soap near the toothpick. I also observed carefully and found that toothpicks were getting farther and farther away.

Why is this? I read and analyzed it. It turns out that sugar cubes have certain water absorption and toothpicks are absorbed at the same time, while soap has certain expansibility, which slowly expands to keep toothpicks away.

It turns out that science is everywhere around us!