Rules: Reply to Group; Answer the previous question in your new post, then ask a new one (new topic); AP level questions, not chem honors. I"ll start. (check later for your :) or :( face! for feedback)
The purpose of the Do Now is to quickly engage students in learning and provide an opportunity for all students to be successful at the start of the lesson. For us as science teachers they are particularly important as they provide an opportunity to assess prior knowledge and consolidate understanding.