Add to ORKGThis lesson plan addresses the following concept: the earth is a complex sphere composed of a variety of interdependent systems. Students will learn about factors that cause ecosystems to be different by studying the basic components of aquatic ecosystems. Field activities where students examine a nearby ecosystem include finding living things in the soil, separating soil into its parts, measuring the temperature of soil, and measuring the water content of soil. The lesson plan provides objectives, skills, time needed, a content outline, materials, and significant terms. The site is part of a group of lesson plans whose main goal is for students to develop an understanding of the interdependence of all organisms and the need for conserving ...