北京君誠學校一周簡報 SIBS Newsletter Week 8

 　　01、環(huán)保教育，從我做起

　　對于全人類，環(huán)保是一項艱巨而偉大的事業(yè)。這不僅關系到我們的生存和發(fā)展，還是下一代能否擁有真正的綠色家園，能否健康成長的重要因素。君誠學校積極開展“環(huán)保教育、從我做起”的主題教育活動，在外方校長的帶領下，老師們在餐廳教會學生遵守用餐規(guī)則，在餐后正確進行垃圾分類。

　　For all mankind, environmental protection is a difficult and great cause. This is not only related to our survival and development, but also the important factor that concerns the healthy growth and whether our next generation can have a real green home. SIBS is actively carrying out the theme education activity of "environmental protection education, start from me". Under the leadership of the foreign principal, teachers teach students to abide by the dining rules in the dining hall and properly classify garbage after meals.

　　02、中學部科學俱樂部創(chuàng)意：通過化學反應雕刻雞蛋

　　同學們取出一顆雞蛋，洗去表面油污、擦干。用毛筆蘸取醋酸，在蛋殼上寫字。等醋酸蒸發(fā)后，把雞蛋放在稀硫酸銅溶液里煮熟，待蛋冷卻后剝去蛋殼，雞蛋白上留下了藍色或紫色的清晰字跡，而外殼卻不留任何痕跡。原理：這是因為醋酸溶解蛋殼后能少量溶入蛋白。雞蛋白是由氨基酸組成的球蛋白，它在弱酸性條件中發(fā)生水解，生成多肽等物質，這些物質中的肽鍵遇Cu2+發(fā)生絡合反應，呈現(xiàn)藍色或紫色。

　　Students took out an egg, washed off the surface oil, dried it. Dipped the brush in acetic acid and wrote on the eggshell. After the acetic acid evaporates, the eggs were boiled in a dilutecopper sulfate solution. When the eggs were cooled, peeled off the shell. Clear blue or purple writing was left on the white of the egg, but no trace of the shell was left.

　　How it works: this is because acetic acidcan dissolve eggshells in small amounts. Egg white is a globul in composed of amino acids, which hydrolyze in weak acidic conditions to produce polypeptides and other substances, the peptide bonds of these substances meet Cu2+ complexreaction, show blue or purple.

　　03、藝術設計部本周學生作品展示

　　本周，六、七年級的專業(yè)課是速寫基礎課程-花卉速寫表現(xiàn)，主要講解了花卉速寫概述、花卉作品賞析、繪畫觀察方法以及最后的繪畫課堂練習-植物速寫寫生。九年級是精微素描，主要根據(jù)學生之前的攝影作品以及老師提供的一些攝影作品，學生選擇后進行繪畫創(chuàng)作，練習學生寫實的觀察能力和表現(xiàn)能力。八和十年級的課程是產品設計速寫，主要講解了設計速寫的作用和方法，課堂練習為產品模型靜物寫生。

　　This week, the specialized course of grade 6 and grade 7 is the basic course of sketching -- expression of flower sketching, which mainly explains the overview of flower sketching, appreciation of flower works, observation methods of painting and the last class practice --sketching of plants. Grade 9 is doing the fine sketch, mainly based on students' previous photography works and some photography works provided by the teacher, students choose first then conduct painting creation, which can practice students' realistic observation ability and performance ability. The eighth and tenth grade course is product design sketch, which mainly explains the function and method of design sketch, the class exercise is painting still life of product model.

　　04、幼兒園抖音作品欣賞

　　幼兒園的活動總是那么豐富多彩。一個個古靈精怪的小娃娃，總讓人忍不住想多看他們一會兒。為此，小君特地做了一組抖音視頻，爸爸媽媽們快來看看吧!

　　Preschool activities are always so colorful. These quirky little dolls always make people can not stop from seeing them for a while. For this, XiaoJun specially made a group of Tik Tok videos, welcome parents come to have a look!