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Ecology.

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Presentation on theme: "Ecology."— Presentation transcript:

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%


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