For your own knowledge, poll the class with this pre-quiz to gauge student understanding of ocean acidification.
You may find that many of them don’t have a comprehensive grasp of ocean acidification and may carry with them misconceptions. Don’t worry. In the engagement step, students will have the opportunity to gain more background knowledge and to have their misconceptions addressed.
You may want to alter this quiz based on your knowledge of the class’s experience with this topic and/or use this quiz again after the engagement step to assess their growth. This pre-quiz should not be counted as a grade now, but the post-quiz could be graded.