1. Lesson #11: Trophic Levels
Objective: Explain the trophic levels found in a sustainable food chain.

2. Complete the pyramid and glue into your notebook.
Activity
In your notebook, define each of the following terms: Producer, Primary Consumer, Secondary Consumer, Tertiary Consumer
Complete the pyramid and glue into your notebook.

3. Notes! (Cause we love them!)
Trophic Levels

4. Trophic Levels
Levels in a food web

5. Trophic Levels
Levels in a food web
Food webs show intricate relationships between organisms.

6. Trophic Levels
Levels in a food web
Food webs show intricate relationships between organisms.
Producers: Autotrophs, use sunlight to create energy

7. Trophic Levels
Levels in a food web
Food webs show intricate relationships between organisms.
Producers: Autotrophs, use sunlight to create energy
Consumers: Heterotrophs, consume other organisms for energy

8. Stable ecosystems have to support each level of consumers.

9. Stable ecosystems have to support each level of consumers.
The 10% Rule

10. Stable ecosystems have to support each level of consumers.
The 10% Rule
Organisms only receive 10% of the energy available in what they eat

11. Stable ecosystems have to support each level of consumers.
The 10% Rule
Organisms only receive 10% of the energy available in what they eat
90% of the energy is lost as heat or other forms of non usable energy

12. Trophic Levels Organization

13. Trophic Levels Organization
Producers provide 100% of the energy in an ecosystem

14. Trophic Levels Organization
Producers provide 100% of the energy in an ecosystem
Largest group of organisms

15. Trophic Levels Organization
Producers provide 100% of the energy in an ecosystem
Largest group of organisms
Tertiary consumers obtain very little energy from producers, and therefore take many organisms to sustain them

16. Trophic Levels Organization
Producers provide 100% of the energy in an ecosystem
Largest group of organisms
Tertiary consumers obtain very little energy from producers, and therefore take many organisms to sustain them
Smallest group of organisms