Talens, Cynthia, et al. “Development of a Two-Tiered Diagnostic Test to Assess learners’ Understanding of the Particulate Nature of Gases”. KIMIKA: The Journal of the Kapisanang Kimika Ng Pilipinas, vol. 35, no. 1, Dec. 2024, pp. 1-16, doi:10.26534/kimika.v35i1.1-16.