ConcepTest: Identifying Oxides
Which of the following formulas represents an oxide?
d. CaSO4 · 2H2O
The correct response is C.
Percentage of students choosing this answer. (% Before Discussion/% After Discussion):
a. FeS2 (6%/3%)
b. KalSi3O8 (10%/3%)
c. Fe2O3 (56%/84%)
d. CaSO4 · 2H2O (28%/10%)
in a small (< 60 students) environmental geology class
If you would like to help acquire more Before and After statistics for this example, please contact the authors (see link at top of page).
References and Notes:
Crystal Chemistry, Systematic Mineralogy:
Oxides and Hydroxides
Resource TypeActivities:Classroom Activity:Short Activity:
Grade LevelCollege Lower (13-14):
Ready for Use
Ready to Use
ThemeTeach the Earth:Course Topics:
Mineralogy, Teach the Earth:Teaching Topics:
Minerals, Teach the Earth:Teaching Environments:
Earth System TopicsSolid Earth:Earth Materials: