In this study, the misconceptions that the students have about heat and temperature and the reasons behind it have been focused. Members of study group include 60 second grade students of the Faculty of Education of Ahi Evran University during 2009-2010 school year. Multiple-choice tests have been used to be able find out misconceptions. In this test, also entitled as "Diagnostic Test", there is a space where students are expected to write why they have chosen that particular option after a number of items including the right answer along with confounding options. In addition, the misconceptions of teacher candidates have been put forth as an outcome of the analysis of data about heat and temperature. (C) 2011 Published by Elsevier Ltd.