Use hand lenses to see details on a flower. Demonstrate an understanding that a cell is the basic unit of living organisms. Describe how single-celled organisms exist. Explore how the use of a microscope allows one to see cells in a variety of organisms. Describe the functions of the major human organ systems.
Fossils show past life, extinct species, and environmental changes over time.
Organisms change and new species may arise due to genetically coded adaptations. Explain how fossils show the existence of past life. Identify characteristics that help organisms live in their environment. Describe ways in which individuals of the same species are alike and different. Compare the similarities and differences of birds and mammals.