Qianjiang Evening News·Hours News Correspondent Qian Jiaqin
Recently, during the class meeting of 908 of Hangzhou Dinglan Experimental Middle School, the head teacher Yu Luling and his classmates held an autumn market event on the playground.
The students formed a group on the weekend, made experimental tools, and made preliminary attempts. In this scientific experiment market, the students not only showed their own experiments, but also appreciated the experiments of other students.
"Look here! Yuehan's hair is standing up!"
"Teacher Yu, the water flow in our group has been combined into one!"
I saw Zhan Yangming stretch out his "magic hand" and touching a can. The two fingers clamped like scissors. The water column that originally divided into five streams of flowing down actually merged into a stream, which was rotating and flowing down.
Yu Yanwen's group members were dipping a ring made of paper cups with a "mysterious seasoning" made of dishwashing liquid, then lifted it up high and blew it vigorously.
"Wow! So beautiful!" Colorful bubbles floated around, shiny in the sun.
During the cup-covering experiment, fine holes were pierced on the paper. When the water bottle was turned upside down, Shui Quean stayed quietly in the bottle, as if it was "sealed" by the paper below. Why can't even drip if there is a hole?
Just as everyone was confused, Zheng Xueer explained the principle. It turns out that the surface of water is tension, just like an invisible hand that can firmly grasp the small gaps, and the umbrella is also made of this principle.
Gao Zhenxiang's group shouted: "Come on! There is an indelible candle!"
Qiu Shuai was holding a conical funnel with his small head leaning against his mouth. He thought he could blow out the candle with just a light slight effort, but he didn't expect that no matter how hard Qiu Shuai tried, he could blow out the candle. And when the head approaches, the candle goes out in an instant.
Wang Ruoxi's group's experiment was conducted in a small box. They carefully floated a toothpick on the water surface, and then put the sugar cube in the basin to a distance from the toothpick. The toothpick seemed to have grown feet and moved towards the sugar gum. Change a basin of water, carefully place the toothpick on the water surface, put the soap into the basin near the toothpick, and slowly stay away from the soap. Such a small box actually hides so many mystery!
Class teacher Yu said that the inspiration for this class meeting came from students' National Day physical project-making homework - making "power carts" and the most popular autumn market nowadays. The combination of the two is both interesting and informative. Students can also experience the charm of labor and reap the joy of cooperation in the process of making experimental equipment. At the same time, they can exercise their ability to solve problems during repeated experiments.
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