For the forth question, all of the 7th grade and two of the 6th grade students gave understanding level responses
by denoting plants take carbon dioxide from the air and release oxygen as a result of the photosynthesis. One 6th
grader did not respond the question. Related to gas exchange in respiration in the same question two of the 6th grade
students were in understanding level, while the misconception of the remaining student persisted as it was in the preinterview.