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观察和实验是研究和学习科学的基本方法,故科学教材中安排了大量的演示实验和一定量的学生分组实验,其目的就是要让学生在观察和实验的基础上接受科学知识,同时训练学生的思维能力。但教材上有些演示实验的现象不明显,对有些重要的规律又缺少实验证实。针对这些问题,经过多年的实验探讨,依据新课标,提出新方法,对一些重要的科学实验做了一些创新与改进。
Observation and experiment are the basic methods of studying and learning science. Therefore, a large number of demonstration experiments and a certain number of students’ group experiments are arranged in the science textbooks. The purpose of this observation is to enable students to accept scientific knowledge on the basis of observation and experiment while training students Thinking ability. However, some demonstrations on the teaching materials are not obvious, and some important laws are lacking in experiments. To solve these problems, after many years of experimental research, according to the new curriculum standards, put forward new methods, made some innovations and improvements on some important scientific experiments.