小学科学教学过程是一个动态的、开放的、不断发展变化的过程,具有许多不确定性和不可预见性。在探究活动的展开和深入过程中,会有许多体现学生新思维、新问题的有效或无效的动态生成出现,这就要求教师必须把握教材、预测学情,并根据课堂探究情况的变化, Primary science teaching process is a dynamic, open, continuous process of change, with many uncertainties and unpredictability. In the course of the exploration and deepening of inquiry activities, there will be many effective or ineffective dynamic generation that reflect the new thinking and new problems of the students, which requires that the teachers must grasp the teaching materials and predict the learning situation. According to the change of the inquiry in the classroom,