论文部分内容阅读
以高三综合复习课《假设与验证·关于实验探究》的教学设计及实践为例,探究“SO2与可溶性钡的强酸盐能否反应生成BaS O3沉淀”。在问题驱动下,学生通过假设和猜想,分析干扰因素,改进完善方案,进行实验验证,最终给出合理的解释和结论。再重新审视2011年北京理综与此相关的实验题,根据实物投影展示学生卷面答题情况,通过学生交流和评价,强化答题技巧,培养学生整合化学信息、逻辑和推理、评价与纠错等综合能力。
Take the teaching design and practice of “Hypothesis and Validation · Experimental Exploration” in the Senior High School as an example to explore whether SO2 and the soluble barium strong acid salt can react to form BaS O3 precipitate. Under the problem-driven, students through the assumptions and conjectures, analysis of interference factors, improve and perfect the program, the experimental verification, and ultimately give a reasonable explanation and conclusions. Re-examine the 2011 Beijing Science and Technology and the related experimental questions, according to the physical projection display students answer questions, through student exchange and evaluation, strengthening the answer skills, training students to integrate chemical information, logic and reasoning, evaluation and error correction Comprehensive ability.