This book is an output of the research conducted to determine the communication behavior of science teachers and its impact to the attitudes of the student in learning science. Teacher communication behavior in a classroom is an important dimension of the classroom learning environment that significantly contributes toward the unique classroom environments which is a result of interactions of students with peers, curriculum and teachers. Results of this study have shown significant relationships of teacher communication behaviors (TCB) namely non-verbal support and controlling in terms of age differences. Simple correlation coefficient indicates a significant correlation on three of the TCB scales namely: challenging, encouragement and praise, non-verbal support and controlling with the attitudinal scale enjoyment in science lessons. The above result signifies that teacher communication behaviors have a strong impact on affective learning and student state of motivation in learning science.