In this chapter, the class works to answer the question, What are the characteristics of trees? Each group of students in the class selects a type of tree to investigate, such as oak, ash, or maple, and then answers the subquestion, “What are the characteristics of ______ trees?” The inquiry begins with a nature walk to observe trees. Students focus on the many different types of trees that can be found in a small area. Then, through research students discover that there are many different species of trees within a given genus (e.g., red, silver, and sugar maples).