ConcepTest: Sedimentary Rock Formation
and is replicated here as part of the SERC Pedagogic Service.
The correct response is A.
Percentage of students choosing this answer. (% Before Discussion/% After Discussion):
a. clastic (59%/81%) b. chemical (22%/4%) c. biochemical. (19%/15%)
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).