2. Good Morning! Warm - Up: 1) What is the difference between a chain and a web? 2) Discuss with the person sitting next to you and be prepared to share with the class. Title the next clean p. & T.O.C. Food Chains/Webs

3. Pay Attention… The following slides are numbered 1-24. For today’s assignment: Write the number and an answer to the question with a diagram or complete sentence/bullet point (don’t write the question).

4. How do biotic compare to abiotic? All living parts of a habitat –Plants –Animals –Bacteria All non-living parts of a habitat -Water -Soil -Rocks -Fire 1 Factors in an ecosystem:

5. Are these animals biotic or abiotic factors? 2

6. Biotic or Abiotic? 3

7. 4

8. 5

9. 6

10. Why are plants called producers? The ultimate source of life is the sun Plants use the sun’s energy to make food in a process called photosynthesis Examples- cactus, trees, algae, phytoplankton 7 energy +CO 2 +H 2 O = sugar + O 2 “plant food”

11. What are consumers? Herbivores- plant-eaters Carnivores- meat-eaters Omnivores- eat plants & meat Scavengers – a carnivore that feeds on body of dead organisms Decomposers- organisms that break down wastes & dead organisms & return materials to ecosystem 8

12. What is a food chain? A sequence that links a species by its feeding relationships Example: grass  cottontail  hawk 9

13. What is a food web? Model that shows the network of feeding relationships, and the flow of energy in the ecosystem Food webs show all the connected food chains 10

14. 11 What do decomposers eat?

15. What is an energy pyramid? Diagram that compares energy used by producers, primary consumers, and secondary consumers Each level is a called a trophic level, and it is occupied by an organism 12

16. What happens at each feeding level? Energy is lost as it flows UP a level Carnivores are at the top Herbivores are at the 2nd level Producers are at the bottom 13

17. 14 Why are bears at the top?

18. 15 Why are there so many producers?

19. Reef Shark The reef shark gets energy by eating parrotfish and triggerfish. 16 Is this a producer or a consumer?

20. Triggerfish The triggerfish gets energy by eating shrimp. 17 Producer or Consumer?

21. Shrimp The shrimp gets energy by eating phytoplankton. 18 Producer or Consumer?

22. Phytoplankton Phytoplankton get energy from the sun. 19 Producer or Consumer?

23. Sea Sponge Sea sponge gets energy by eating zooplankton. 20 Producer or Consumer?

24. Zooplankton Zooplankton get energy by eating phytoplankton. 21 Producer or Consumer?

25. Parrotfish The parrotfish gets energy by eating algae 22 Producer or Consumer?

26. Sea Turtle The sea turtle gets energy by eating algae. 23 Producer or Consumer?

27. Algae Algae get their energy from the sun. 24 Producer or Consumer?

28. food chain compared to food web It moves like a cycle It has few organisms –Plant to animal –Animal to animal It goes in many directions It has many organisms -Plant to animal 1, animal 2, … Compare: Both show what organisms eat, and the flow of energy

29. End.

30. Check Your Answers! 1.Biotic are all the LIVING parts of an ecosystem, whereas abiotic are the NON-living parts of an ecosystem. 2.Giraffe (animals) = Biotic 3.Plant = Biotic 4.Gold = Abiotic 5.Caterpillar = Biotic 6.Fire = Abiotic 7.Plants are called producers because they make their own energy. 8.Consumers are organisms that must get their energy from an outside source (do not produce their own energy). 9.A food chain is a sequence that links a species by its feeding relationship. 10. A food web is all of the interconnected feeding relationships within an ecosystem. 11. Decomposers eat the dead organic material.

31. Answers Continued 12. An energy pyramid is a diagram showing the energy used at different trophic (feeding) levels. 13. At each feeding level, 90% of the energy is lost as you go up each step. 14. Bears are at the top because they are a top level consumer. 15. There are so many producers because they can make their own energy and are not limited by a food source. 16. Shark = Consumer 17. Triggerfish = Consumer 18. Shrimp = Consumer 19. Phytoplankton = Producer 20. Sea Sponge = Consumer 21. Zooplankton = Consumer 22. Parrotfish = Consumer 23. Sea Turtle = Consumer 24. Algae = Producer