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例1 请你设计一个简单的实验区别铁粉和炭粉两种粉末,简述操作过程和实验现象. 解析:实验方案的设计是研究性学习的基础.本题提出以实验的方法解决实际问题的要求,侧重考查学生对物质进行鉴别的实验能力.试题设计中虽然增加了“简单的”这一限制条件,但实验设计仍具有充分的开放性,不约束学生思维空间,尊重学生的思维个性.开放性试题能使学生在解决问题的过程中体验乐趣,更深
Example 1 Please design a simple experiment to distinguish between iron powder and carbon powder. Briefly describe the operation process and experimental phenomena. Analysis: The design of the experimental program is the basis of research learning. This question proposes to solve practical problems by experimental methods. Requirements, focusing on students’ ability to identify substances for experimentation. Although the “simple” limitation was added to the test design, the experimental design still has sufficient openness to not restrict students’ thinking space and respect students’ thinking personality. Open questions can enable students to experience fun while solving problems.