“通过实验学化学”是新课程对化学教学的基本要求。为了能够让学生在课堂上愉快地进行实验探究活动,针对仁爱版初中化学教科书中“探究微粒运动”的两个实验~([1]),我们进行了微型化、封闭化方面的设计。一、实验1微型化与封闭化设计方案在“注射用头孢拉定”小药瓶的底部放一小团脱脂棉,用于吸收蒸馏水和酚酞试液,衬托和放大实验现象。先向脱脂棉的中间部位滴加两滴蒸馏水,接着向脱脂 “Through experimental chemistry” is the basic requirement for the new curriculum for chemistry teaching. In order to enable students to perform experimental exploration activities happily in the classroom, we conducted miniaturization and closure design for two experiments ([1]) in the “Rate of Particle Movement” in the junior love chemistry textbook for junior high school. . I. Experiment 1 Miniaturization and Closure Design Scheme A small group of absorbent cotton was placed at the bottom of the “Cephradine injection” vial for absorption of distilled water and phenolphthalein test solution to set off and amplify experimental phenomena. First add two drops of distilled water to the middle of the absorbent cotton, followed by degreasing