Ecosystems:
WHAT ARE THEY AND HOW
DO THEY WORK?
Chapter 3
, Learning objectives:
In this chapter, students will be able to:
• understand what keeps us and other organisms
alive
• learn about the major components of an
ecosystem
• reflect on how scientists study ecosystems
,“What keeps us and other
organisms alive?”
, components of earth’s life support system
atmosphere geosphere
hydrosphere biosphere
WHAT ARE THEY AND HOW
DO THEY WORK?
Chapter 3
, Learning objectives:
In this chapter, students will be able to:
• understand what keeps us and other organisms
alive
• learn about the major components of an
ecosystem
• reflect on how scientists study ecosystems
,“What keeps us and other
organisms alive?”
, components of earth’s life support system
atmosphere geosphere
hydrosphere biosphere
