Urban Ecosystems 3: Cities as Population Centers

11 Common Themes

  • Subchapter A
    • Systems
      • For Grades: 6-8
        • Learning Goal 2
          • Thinking about things as systems means looking for how every part relates to others. The output from one part of a system (which can include material, energy, or information) can become the input to other parts. Such feedback can serve to control what goes on in the system as a whole.