How do plants and animals become fossils? Objective Identify fossils and how they are formed. Background Teachers should read and review information in A Fossil’s Journey with students. Preparation Materials Paper Cups Liquid Mud or Clay- of two or more contrasting colors Bones, Shells, Leaves- or other possible fossils Plastic Spoons, Toothpicks, or Small Nails Set Up Have students bring in small leaves, bones, and/or shells to act as their “fossils”. Explain that they are going to simulate a lake in which mud is slowly being deposited. In this lake live plants and animals that fall to the bo Duration: 90 Minutes Additional Standards: 3rd Grade: 3-LS4-1, 3-LS4-2, and 3-LS4-3.