In recent years, the shortage of experiences of children serves as a big social problem.
Moreover, the opportunities for students of real-experience through experiments or observations are decreasing. Those are considered to prevent development of children's scientific thinking ability, and be the cause of low interest in science. In the present study, the meaning was verified focusing on students' reaction in the experience study consisting mainly of the experiment and observation carried out for the junior high school student and the high school student. It was suggested that the existing knowledge reinforced by a little experience helped students' understanding.