The purpose of this study is to examine the impact of the Life-based Science Education on the development of environmental awareness of middle school fifth grade students. For this purpose, activities have been developed and implemented in the scope of Life Based Science Education related to "Heat and Temperature, Human and Environmental Relations, Variables Affecting the Luminous Brightness in a Simple Electric Circuit" selected in the fields of physics, chemistry and biology. The study group consists of a total of 60 students who are educated in two different 5th classes in a middle school selected by appropriate sampling method in Ankara. In the study, the data were collected with the "Environmental Consciousness Scale" which is a ready scale. The data are analyzed descriptively and the results are presented as mean, standard deviation, table and graphical representation. Pre-test scores were t-test independent groups to ensure consistency between groups. The dependent groups were examined by t-test and ANCOVA to determine whether there was a significant difference between the environmental consciousness scale scores and the pre-test-post test score averages. The results show that the method used increases the environmental awareness level of the students. At the end of the study, suggestions were presented for alternative activities and applications to improve life-based science education activities.