Khairiyah, U. , Suryanti, S. and Widodo, W. 2025. Development of an ethnoscience-based REA learning model in natural science lessons changes in the form of objects: Analysis of validity and reliability. Edelweiss Applied Science and Technology. 9, 5 (May 2025), 1820–1831. DOI:https://doi.org/10.55214/25768484.v9i4.7290.