Lunet's charisma of may 15th is hidden in the book's concept of formulae and more in the lively and interesting exploration of practice. In order to give students a visual sense of the fermentation of micro-organisms in order to implement the biology core, recently all the students of the second and third biological group of leyung high school in jenan city carried out a pickle-making and fermentation experiment, which allowed their classmates to feel the unique charm of biology in their hands。
Fermentation is a traditional business that has been in life for a long time and a necessary knowledge point for high school biology. The fermentation principle used to make pickles and brew rice is an excellent example of the use of textbook knowledge in life. Prior to the start of the campaign, biological teachers were well prepared in advance to finalize detailed experimental processes and carefully select fresh and quality food. On the classroom level, the teachers speak vividly about fermentation, distinguish between pickle fermentation and rice fermentation, so as to make the hard-to-understood principles of biology easy to understand, and to lay a solid foundation for their own hands。
In the hands-on cycle, the students were full of enthusiasm and were fully immersed in fun experiments. When you make pickles, you cut the vegetables, finely set the pickles, and a layer of food is sealed, so you know the mystery of anaerobic fermentation that produces lactated acid. At the scene of the rice production, which was also hot, the students carried out the steps of bubble rice, steam rice, cooling, mixing wines, sealing and so on。
Students continue to observe the fermentation status of pickles and gin, compare fermentation results in different environments, complete the laboratory records and summaries, and complete the scientific exploration. Faced with the small problems of excessive temperature of some of the groups and the tight sealing of the containers, the students discussed each other, taking into account the problems of learning in the classroom and adjusting the operation. Finally, the classmates and the teachers tasted the joy of success and tasted the pickles and rice wine they had fermented。
From the point of passive memory to the principle of active exploration, this fermentation experiment makes the dry biological theory vivid. In the days of fermentation, microbes are metabolized and transformed in closed containers, and students ' hands-on operational skills and biological knowledge are constantly improving. As a result of the event, students not only read the scientific wisdom that lies in the traditional foods of their specialty, but also felt the unique charisma of the blending of traditional folklore with modern biological knowledge. Cai meng-cai
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