“…However, previous studies have reported difficulties in understanding photosynthesis, and misconceptions concerning this phenomenon seem to be quite common (see, e.g., Ahopelto, Mikkilä-Erdmann, Anto, & Penttinen, 2011;Mikkilä-Erdmann, 2001Roth, 1990;Vosniadou, Vamvakoussi, & Skopeliti, 2008). Students' prior knowledge might act as a filter that prevents the construction of new knowledge-their everyday notions of food as a requirement for life might lead them to think, for example, that plants "eat" water and nutrients from the soil via roots (Mikkilä-Erdmann, 2001;Mikkilä-Erdmann et al, 2008;Mintzes & Wandersee, 2005;Roth, 1990;Vosniadou, Vamvakoussi, & Skopeliti, 2008). The problem with misconceptions is that they seem to be very resistant to change (Chi, 2005).…”