实验是自然教学的重要方法之一。它是在教师的指导下,有目的地让学生通过感官去认识、研究自然知识。它不仅为学生提供丰富的感性知识,培养学生动手操作能力和观察能力,也是培养学生思维能力的重要手段,更是活跃课堂气氛、丰富学生学习内容、激发学生学习兴趣的重要途径。有趣的实验会使学生学习的兴趣更浓烈,思维更活跃,因此应当充分重视实验在自然教学中的作用。 演示实验是自然教学中广泛采用的一种实验教学方法,学生通过观察和教师的讲 Experiment is one of the important ways of teaching nature. It is under the guidance of teachers, purposefully let students through the senses to understand, study natural knowledge. It is not only for students to provide rich perceptual knowledge, training students ability to operate and observe the ability of students is also an important means of training students thinking ability, but also active classroom atmosphere, enrich students learning content, stimulate students interest in learning an important way. Interesting experiments will make students interested in learning more intense, more active thinking, it should give full attention to the role of the experiment in the teaching of nature. Demonstration experiment is a kind of experimental teaching method which is widely used in nature teaching. Students observe and teachers say