. Percentages of students and
teachers regarding their some alternative concepts were as summarized in
Table 3. Based on the data in Table 3, it could be said that students and even
physics teachers had alternative conceptions about basic astronomy
concepts. Also, the percentages of alternative conceptions that were
measured with the two-tier items in all subjects were lower than the
percentages of alternative conceptions that were measured only according
to the first tier when Table 3 was examined. This condition was caused by
lack of knowledge among students and physics teachers.