This unit is designed to accompany the FOSS Structures of Life unit. It consists of four investigations dealing with observable characteristics of organisms. In this unit, students will observe, compare, categorize, and care for a selection of organisms. This Powerpoint collection of lessons summarizes the content of each investigation, reinforces the academic vocabulary, and reviews all the questions presented in the student resource book. I have always found that the ability to frontload concepts visually, as well as to review them in such manner leads to a higher level of understanding on the part of the students.