1. Living Things Need Energy

2. Energy  Sunlight is the source of energy for almost all living things.

3. Begins with the SUN as the source of energy for all living things Photosynthesis occurs because of the sun 6CO 2 + 6H 2 O + sunlight & chlorophyll  C6H 12 O 6 + 6O 2

4. Producers  Organisms that use sunlight to make food

5. Consumers  Organisms that get energy from eating other organisms

6. Herbivore  Organisms that eats plants (gophers, grasshoppers)  PRIMARY CONSUMERS

7. Carnivore  Organisms that eat other animals (wolf, coyotes, owls)

8. Omnivore  Organisms that eats both plants and animals (bears, humans)  SECONDARY/TERTIARY CONSUMERS

9. Scavengers  They eat dead things  Coyotes  Vultures

10. Decomposers  Break down the remains of other organisms (recycles)

11. Consumer Levels  Primary Consumers (1 st level) – get their energy from plants HERBIVORES  Secondary Consumers (2 nd level) – get their energy from other organisms – CARNIVORES/OMNIVORES  Tertiary Consumers (3 rd level) – get their energy from other organisms – CARNIVORES/OMNIVORES/SCAVENGERS

12. Food Chain  Shows the transfer of energy in one pathway

13. Food Web  Shows many energy pathways in an ecosystem

14. Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID.

15. Energy Pyramid Interactive  Webpage Webpage

16. Energy pyramids show  Trophic level indicates an organism’s position in a food chain.  The number of consumers in a level will decrease as the trophic levels get higher because they have to eat more organisms to stay alive

18. Not all energy is used by producers 10% of the energy stored can be passed on to organisms that cannot make their own food. 90% of the energy is used for everyday life processes (breathing, moving, digestion, etc…) Some energy is lost as heat. Energy

20. Closer look at food webs  Food Web - Menu Food Web - Menu Food Web - Menu