Objectives. Collect and compare different types of leaves.Discuss how leaves how leaves are alike and different. . Procedures. 1) Collect different kinds of leaves and obtain a ruler. 2) Place the leaves on your desk and compare them. What can you say about the shapes of the leaves? How do they differ in size? 3) Place the leaves in groups according to properties, such as color size, kind (maple, oak, etc.), number of points, and arrangement of veins. How many groups did you get?.