1. April 29th, 2013
Warm - Up:
1) What is the difference between a chain and a web? 2) In 2 minutes, write a definition for each, and compare what you wrote with the person sitting next to you.

2. April 29th, 2013
The following slides are numbered For today’s assignment:
Write the number and an answer to the question (don’t write the question) 2

3. How do biotic compare to abiotic?
1 Factors in an ecosystem:
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

4. Are these animals biotic or abiotic factors?2
Are these animals biotic or abiotic factors?

5. 3
Biotic or Abiotic?

6. 4
Biotic or Abiotic?

7. 5
Biotic or Abiotic?

8. 6
Biotic or Abiotic?

9. Why are plants called producers?7
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
energy +CO2 +H2O = sugar + O2
“plant food”

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

11. 9
What is a food chain?
A sequence that links a species by its feeding relationships
Example: grass  cottontail  hawk

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

13. 11 What do decomposers eat?

14. April 30th, 2013
Today’s Warm-Up  Draw two food chains for two different carnivores.
AGENDA
Any presentations?
The following slides are numbered For today’s assignment:
Write the number and an answer to the question (don’t write the question)
QUIZ using ecosystems poster 14

15. What is an energy pyramid?12
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

16. What happens at each feeding level?13
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

17. 14 Why are bears at the top?

18. 15 Why are there so many producers?

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

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

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

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

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

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

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

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

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

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

29. End.

30. April 30th, 2013
What features enable fish to survive underwater? (Give two examples)
Why do snakes live so well in the desert?
Why do mosquitoes need people?
For today’s assignment:
Write the number and an answer to the question (don’t write the question) 30