Nonfiction library books related to ecology that include information on decomposers. You may of course substitute other experts. Help students to note the importance of recording location and conditions when samples are taken. Discuss the importance of capturing detail in sketches and words. Relate this to work of naturalists.
Students observe that teacher has gathered decomposing materials in plastic bags.
Explain to students that the same type of changes occurring in the bags constantly occur outdoors. Once-living materials are broken down by millions of microscopic bacteria, fungi, and other decomposers. Prepare for field exploration by discussing some do's and don'ts of field work. Prior to boarding the bus, prepare for field exploration. Using the list generated the previous week, review with students how scientists behave while doing research.