Toothpick for swimming English page 42

Toothpick that can swim (fourth grade summer homework book Chinese. English) page 42, if the material soap
Put in toothpicks and ice, and the toothpicks will stay away
Toothpick that can swim
Some time ago, I saw a particularly interesting scientific experiment called toothpick that can swim on my summer homework. I decided to do this experiment tonight. I have prepared materials: two toothpicks, teeth, a basin of water, sponge blocks. I put toothpaste on one end of the toothpick firstToothpick that can swim my discovery
I found that if you put a little soap or some surfactant on one end of the toothpick, the toothpick floating on the water will automatically move. Many small things in life can become inventions and discoveries. As long as you are willing to find them, you will gain. Science is like a magician, but it doesn't use any deceptionI want to know the secret of toothpicks that can swim
Science is like a magician, but it does not use any deception, but its real ability. As long as we believe in science and dare to explore, we will be able to discover the mysteries of science! Today, I succeeded in a simple and interesting experiment, not to mention how happy I wasWhy does a toothpick that can swim move when it is placed on the water
Because of its powerful function. Such as: water flow, wind and waves, external forcesWhy can toothpicks swim
We all know that if you put a toothpick in the water, it will only float on the water. How can you make it swim? This depends on our mysterious "guest" - shampoo to help! Dip some shampoo on the thick end of the toothpick, and then put the toothpick into the waterWhat is the principle that toothpicks can swim
Experimental materials: an ordinary toothpick, a little detergent, and a basin of water. In the experiment, take a toothpick and dip a little detergent on the flat end. Put the toothpick stained with detergent flat into the basin, and then you will see the toothpick swimming on the water, which is very interesting. No one pushed, no windSummer homework: toothpicks that can swim. What did you find
"Wow, it's amazing. Why is this?" I scratched the back of my head and asked while doing the experiment. This experiment is called "toothpick that can swim", which I read from a book. Let's take a look at the experimental process first! First of all, we have to invite the protagonist of the experiment - toothpicks, and then prepare a basin of water. Please pay attention to the key pointsFor toothpicks that can swim, replace sugar cubes and soap with other substances. In which direction will the toothpicks move_ Baidu
Opposite direction
Experiment question: what is the discovery of toothpicks that can swim
Because once detergent and washing powder are stained with water, a chemical reaction will occur, making them mutually exclusive, and there is a very small thrust. Because the density of water is small, this thrust can also be converted into power, which is called the transformation of work and force