This checklist is meant to be determined by your class. The categories provided are what my class thought every living thing needed. Have your class come up with a list of things that all living things need and change the categories accordingly. When going through the checklist, they will find that some nonliving things have the qualities they thought only living things had. They will also find that some living things do not have the qualities they thought all living things had/needed. This is a good precursor to explaining basic needs and the qualities all living things poses.