1. Ecology
Plants and animals depend on each other and their physical environment.

2. Objective
Describe the flow of energy and matter through food chains and food webs.

3. Energy Flow Through Ecosystems
Energy flows through ecosystems in one direction
Energy flows from the Sun to Producers to Consumers to Decomposers

4. Energy Flow Through Ecosystems

5. Energy Flow Through Ecosystems
process may be visualized with food chains

6. Energy Flow Through Ecosystems
process may be visualized with energy pyramids.

7. Food Webs
Food webs identify feeding relationships among producers, consumers, and decomposers in an ecosystem.

8. Matter Cycles
Matter is transferred from one organism to another and between organisms and their physical environment.

9. wAter Cycle

10. Carbon and Oxygen Cycle in PS.

11. CARBON Cycle

12. Nitrogen Cycle

13. Objective
Provide evidence that green plants make food and explain the significance of this process to other organisms

14. Photosynthesis
the Sun’s energy is converted into and stored as chemical energy in the form of a sugar.

15. Photosynthesis
Photosynthesis is carried on by green plants and other organisms containing chlorophyll.
Moss Chloroplasts
Chlorophyll Molecule
(found inside the chloroplasts)

16. Photosynthesis
The quantity of sugar molecules increases in green plants as sunlight increases

17. Oxygen and Carbon Dioxide
The major source of atmospheric oxygen is photosynthesis.

18. Oxygen and Carbon Dioxide
Carbon dioxide is removed from the atmosphere and oxygen is released during photosynthesis.

19. Producers
Green plants are the producers of food which is used directly or indirectly by consumers

20. Producers
Green plants are the producers of food which is used directly or indirectly by consumers