Chapter 3: Ecosystems: What are They and How Do They Work?
|
Section 1: How does the Earth's Life-Support System Work?
Concept 3-1A: The four major components of the earth's life support system are the atmosphere (air), the hydrosphere (water), the geosphere (rock, soil, and sediment), and the biosphere (living things). Concept 3-1B: Life is sustained by the flow of energy from the sun through the biosphere, the cycling of nutrients within the biosphere, and gravity. Section 2: What are the Major Components of an Ecosystem?
Concept 3-2: Some organisms produce the nutrients they need, others get the nutrients they need by consuming other organisms, and some recycle nutrients back to producers by decomposing the wastes and remains of other organisms. |
Section 3: What Happens to Energy in an Ecosystem?
Concept 3-3: As energy flows through ecosystems in food chains and webs, the amount of chemical energy available to organisms at each successive feeding level decreases. Section 4: What Happens to Matter in an Ecosystem?
Concept 3-4: Matter, in the form of nutrients, cycles within and among ecosystems and the biosphere, and human activities are altering these chemical cycles. Section 5: How Do Scientists Study Ecosystems?
Concept 3-5: Scientists use both field research and laboratory research, as well as mathematical and other models, to learn about ecosystems. |
Files:
|
| ||||
| APES Ch. 3 Glossary |
Key Terms:
|
|