“…The concepts of "floating and sinking" are two very common concepts that have been studied both in different countries and also in Turkey. All around the world, there are numerous studies (Hadjiachilleos, Valanides, & Angeli, 2013;Luo, 2006;Potvin, Masson, Lafortune, & Cyr, 2015;Srisawasdi, & Panjaburee, 2015;Wong, & Lau, 2014;Yin et al, 2013) recently focused specifically on middle school students' conceptual understanding on the concepts of floating and sinking. The findings of these studies listed above indicate that middle school students have limited or incorrect understanding about floating and sinking.…”