Describe the apparent motion of groups of stars in the night sky relative to Earth and how various cultures have related to these groups of stars. Locate and identify stars that are grouped in patterns in the night sky. Identify ways people have historically grouped stars in the night sky. Compare the distances between stars in a constellation. Describe ways that familiar groups of stars may be used for navigation.
Microorganisms are components of every ecosystem on Earth.
Microorganisms range in complexity from single to multi-cellular organisms. Most microorganisms do not cause disease and many are beneficial. Microorganisms require food, water, air, a way to dispose of waste and an environment in which they can live. Identify the distinctive features of bacteria, fungi, algae and protozoan. Examine and describe size, shapes, and structures of organisms found in an environment such as pond water.