小学生对自然科学事物的认识最初是来源于感知,也就是用视觉、听觉、嗅觉、味觉、触觉等各种感觉器官去直接感知客观的自然事物。只有有了充分的感知,才能形成相应的表象。小学生的感知往往凭兴趣进行,既笼统又不精细,抓不住事物的主要特征和相互联系等特点,尽管科学课的内容大 Primary school students’ understanding of the natural sciences is originated from perception, that is, they directly perceive the objective natural things through various sensory organs such as vision, hearing, smell, taste and touch. Only with a full sense, to form the appropriate appearance. Perceptions of primary school students tend to be based on their interests, both general and delicate, unable to grasp the main features of things and interrelated characteristics, although the content of science class