Feb. 17th WARM UP
• Write a simplified definition for the following:
1.
2.
3.
4.
Food chain
Energy pyramid
Secondary consumer
Trophic
ANNOUNCEMENTS:
See board
Learning Goal
• 4 – Explain the relationship between different
organisms of an ecosystem and describe the
importance of key species
• 3 – understand the basics of food webs and
food chains
• 2 – know what a food chain is
• 1 – need to review this concept
Food Chain vs Food Web
• What is the difference?
• What are keystone species?
• What kinds of things can influence an
ecosystem?
1. Ecosystem
a. Ecosystem:
b. Biotic:
c. Abiotic:
• Study Jams Ecosystem
Food Chains
• What was the food chain for our Hunger
Games lab?
• What were some biotic & abiotic factors
• Food Web
• Food Chain & Pyramid
2. Organisms in an Ecosystem
a.
b.
c.
d.
Animals that only eat plants  herbivores
Animals that only eat animals  carnivores
Animals that eat plants & animals  omnivores
Organisms that breakdown other organisms 
decomposers
• Trophic:
• Each level can also
be called “trophic”
• Means: food or
feeding in Greek:
Τροφή
Food Web Activity
• Create a correct food web (at least 7 organisms)
for the following biomes with your table
–
–
–
–
–
–
–
–
Rain forest
Desert
Grassland
Deciduous forest (ie: Appalatians)
Boreal forest (ie: Canada)
Tundra
Stream
Ocean
Energy Pyramids
Energy Flow
• With a partner discuss:
1. If the food chain had continued to the next level,
what percentage of energy would the next level
consumer have received from the previous
consumer?
2. How much water would you have transferred
into the the next level consumer’s cup?
3. Judging from this activity, why do you think most
food chains never go higher than 2nd or 3rd level
consumers?
Fill in the blanks
http://schoolworkhelper.net/wp-content/uploads/2011/01/EnergyPyramid-26a65z5.gif
Fill in the Blanks
C2.5 kcalkcal
B 25 kcal
kcal
250 kcal
A2500kcalkcal
http://www.proprofs.com/quiz-school/upload/yuiupload/244802756.jpg
Other Types of Pyramids
Number Pyramid
Biomass Pyramid