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The purpose of this study is to reveal the levels of knowledge held by pre-service science teacher concerning the nitrogen – phosphorus cycle, using the expression and drawing method. Awareness of a cyclical relationship between nitrogen and phosphorus, which are a vital requirement for living creatures, and living beings and their environment, plays an important role in the understanding of material cycles. 60 candidate teachers, whose education in the 3rd year of the Program in Elementary Science Education, in the Faculty of Education, at the Eskisehir Osmangazi University, is continuing, have participated in this study. It was requested that candidate teachers express the nitrogen and phosphorus cycle in nature both in words and pictures. The writings and drawings of candidate teachers on the two cycles have been have been analysed using the descriptive analysis method. The drawings and written explanations have been grouped and interpreted in terms of levels. As a result of the study, the level of knowledge held by candidate teachers in respect of the nitrogen cycle was determined as level 3 in terms of the levels of knowledge of 63.3%, and in terms of the drawing levels of 76.6% of candidate teachers. When the phosphorus cycle was examined, the levels of knowledge of 43.3%, and drawing levels of 45% of candidate teachers were determined to be at level 3.

The Comparison of the Knowledge of Pre-Service Teacher on the Nitrogen-Phosphorus Cycles Using the Writing and Drawing Method