1. Ecosystem Structure
I did not do an IN and OUT for this lesson. Notes are long (2 pages) with lots of discussion. If you would like to do an IN and OUT instead of having them draw an example of a food web and food chain that would be fine.

2. What is an ecosystem?
Do you remember?

3. a. Abiotic
(Nonliving)
A. unit that includes all the interacting parts of an environment in an area
Ecosystem
b. Biotic
(Living)

4. Biotic or Abiotic?
Bacteria

5. Biotic
Bacteria

6. Biotic or Abiotic?
The Sun

7. Abiotic
The Sun

8. Biotic or Abiotic?
Leather
Seats

9. Biotic
Leather
Seats

10. Biotic or Abiotic?
Dead Dog

11. Biotic
Dead Dog

12. Biotic or Abiotic?
Temperature

13. Abiotic
Temperature

14. Biotic or Abiotic?
Tire

15. Biotic
Tire

16. Ecosystem Structure A. Energy flows when organisms eat
Sun’s energy>photosynthesis>glucose
Ecosystem Structure
B. Autotroph = make their own food from chemicals and light
C. Heterotroph = must obtain food; can’t make it

17. Mini - Structure E. Habitat = place where organisms live; “address”
D. Niche= way of life; physical space and role; “profession”

18. Who’s Niche is this
Gathering acorns?

20. Who’s habitat is this?

22. Trophic Levels (feeding levels)
a. Herbivore = eat plants
A. Producers = autotrophs that make their own food
b. Omnivore = eat flesh and plants
B. Consumers = heterotrophs that eat other plants and animals
c. Carnivore = eat flesh
d. Scavenger = feed on organisms that recently died
C. Decomposers = break down dead tissue and waste

23. Consumers First level consumers feed on producers (Herbivores)
The zebra eats the grass
Second level consumers eat the first level consumers (Carnivores)
The lion eats the zebra
*Omnivores can be first level or second level consumers
Tertiary consumers eat the second level consumers
The vulture eats the lion

24. Which of these are producers?

25. Which of these are first level consumers?

26. What is another name for first level consumers?

27. Herbivore

28. Which of these are second level consumers?

29. What is another name for a second level consumer?

30. Carnivore

31. Food Chain = specific order in which organisms obtain energy in an ecosystem
Food Web = complex interconnected food chains
Food Web
Food chain

33. Make a food chain Eagle Coyote Frog Daisy Grasshopper
There will be a blank left side page in between note sheets. Students can do this on that sheet instead of an IN and OUT or you can have them do and IN and OUT and have them do this on there desk in chalk.

34. Answer: Notice the direction of the arrows.
--->
--->
---->
---->
Notice the direction of the arrows.
This shows the flow of energy

35. Food Web

36. Make a food web Mountain Goat Fungi Ladybug Deer Bear Sparrow Oak Tree
Barn owl
They can do this on the same page they did the food chain. I did not create an answer for this one. Here I just discuss with the students what eats what.
Grass
Spider
Fox

37. Use the description below to answer the following question.
In a marine ecosystem, disease killed most of the sea otters. This allowed the sea urchins and clams to increase in number. As a result, the sea gull population increased and the seaweed population decreased.
Identify a secondary consumer in this marine ecosystem.
Seaweed
Clam
Sea urchin
Sea gull
Sea Gulls
Sea Otters
Sea Urchins
Clams
These are just some questions you can do if you have time. I just do these orally.
Seaweed

38. Use the description below to answer the following question.
In a marine ecosystem, disease killed most of the sea otters. This allowed the sea urchins and clams to increase in number. As a result, the sea gull population increased and the seaweed population decreased.
Identify a secondary consumer in this marine ecosystem.
Seaweed
Clam
Sea urchin
Sea gull
Sea Gulls
Sea Otters
Sea Urchins
Clams
Seaweed

39. What abiotic factor is the initial energy source in most food webs?
Producers
Rain
Bacteria
Sun

40. What abiotic factor is the initial energy source in most food webs?
Producers
Rain
Bacteria
Sun