我们发现,在初中科学课堂中,课堂沉默是一个非常严重的现象。本文从教育学、心理学、生理学的角度来分析学生课堂沉默的原因,并从主人意识、设计层次问题、发展性评价、趣味性四个方面来改变课堂沉默,让科学课堂变得有声有色。 We found that classroom silence is a very serious phenomenon in junior high school science classrooms. This article analyzes the reasons of students’ silence in classroom from the aspects of pedagogy, psychology and physiology, and changes the silence of classroom from four aspects: the sense of mastership, the design level, the developmental evaluation and the interest, so that the science classroom becomes vivid and colorful.