Sept 29

Objective: The student will discuss food chains and trophic levels in order to explain the flow of energy in an ecosystem. The students will illustrate how all organisms are part of and depend on two major global fob webs that are positively or negatively influenced by human activity and technology.


Warm Up:


1. If the trout were overfished, which population of organisms would most likely increase as a direct result?

a. algae
b. trout
c. minnows
d. zooplankton

2. Which level of the pyramid represents the largest percentage of available energy?
a. algae
b. minnows
c. trout
d. zooplankton
3. Which of these is the ultimate source of energy for the majority of life on Earth?
a. plants
b. the sun
c. bacteria
d. the ocean

Sea otters eat sea urchins. Sea urchins eat kelp, a type of brown algae. What might be the short-term effect on the ecosystem if great numbers of sea otters were removed from this environment?


A. increase in sea urchin population, decrease in kelp population


b. decrease in sea urchin population, increase in kelp population




c. increase in sea urchin population, increase in kelp population


d. decrease in sea urchin population, decrease in kelp population

Vocabulary:
1. omnivore
2. detritivore
3. decomposers
4. food chain
5. food web


P.O.A
1. Warm Up and Vocabulary
2. Hand in homework
3. Complete owl pellet lab
4. food web discussion
5. food web


Tonight's Homework:
Finish food web
Remember must have:
10 organisms
labeled- consumer/producer (carnivore, omnivore, herbivore, decomposer etc.)
Organism labeled
arrows going in the proper directions


Homework Due:
Read and Outline 3-3