1. Ecology

2. SPI
Interpret how materials and energy are transferred through an ecosystem.

3. Energy
All living things need energy to survive. What are the four ways organisms are divided to obtain energy?

4. How energy is transferred?
Energy is transferred by one organism consuming another. There are two ways to show energy transferring.

5. Describe a Food Chain
A food chain shows how energy flows from one organism to another. (Simple chains rarely happen in nature.)

6. Describe a Food Chain
Sun
Grass
hopper
Frog

7. Describe a Food Web
A food web shows how energy moves through an ecosystem. (It is the overlapping of food chains.)

8. Describe a Food Chain
Sun

9. The arrow show you what DIRECTION the energy is moving
What about the arrow?
The arrow show you what DIRECTION the energy is moving

10. Flow of Energy
90% of the energy is used by the organism. Only about 10% of the energy is transferred to the next level. It is called the rule of 10

11. Contains producers, consumers & decomposers
Food Chain vs Food Web
Shows transfer for one path - from one organism to another
Shows transfer from all organisms in
an ecosystem
Organisms
Energy transfers
Contains producers, consumers & decomposers
Looks like a straight line
Looks like a spider web
Rule of 10%