This is the 22nd installment of my STEM Bell Ringers series (Science, Technology, Engineering and Math), and it signifies a change. There are 20 open ended questions, but the answers key and references are included for the teachers are the students who may struggle to recall information. This is a good activity for morning work, ticket out the door, test-prep, or homework. Topics covered in this set include: Physical Science Review - simple machines Math Vocabulary and review Engineering jobs a