1. Do Now Activity
What is the difference between an autotroph and a heterotroph?
What is the difference between cellular respiration and photosynthesis?
What is the difference between a carnivore and an omnivore?

2. Essential Question: Section 7-2: energy flow
How does energy move through the trophic levels and what happens to it when it is passed from one trophic level to the next?
Learning Target
Describe the movement of energy across trophic levels.
Explain energy distribution when moving from one trophic level to the next.
Section 7-2: energy flow

3. Check the class calendar!
announcements
Check the class calendar!

4. announcements Available Extra Credit: Tissue Box = 10 Points CP
Starburst Original Jellybeans = 30 Points CP
Stauffer’s Original Animal Crackers = 30 Points CP

5. Don’t forget to chunk your notes!

6. Food chains
Food chains show energy moving from the ___ to the __________ to the __________ .
sun
producer
consumer

7. Each step of a food chain is called a ____________ .
Food chains
Each step of a food chain is called a ____________ .
trophic level

8. Don’t forget to chunk your notes!

9. A food web connects all the ____ ________ within an ecosystem together
Food webs
A food web connects all the ____ ________ within an ecosystem together
food
chains

10. Don’t forget to chunk your notes!

11. Trophic levels
Only about ____ % of the Energy in one level is transferred to the next. 1% 10
10%
100%
Energy Pyramid

12. Most of the energy consumed is used by the animal to keep it alive.
Trophic levels
Most of the energy consumed is used by the animal to keep it alive. 1%
10%
100%
Energy Pyramid

13. What is left is released as _______ into the environment
Trophic levels
What is left is released as _______ into the environment 1%
heat
10%
100%
Energy Pyramid

14. According to the pyramid, what organism is in the third trophic level?
The Biomass Pyramid
According to the pyramid, what organism is in the third trophic level?
Grass
Grasshopper
Frog
Snake

15. The Biomass Pyramid
According to the pyramid, how much energy will the last trophic level gain?
1,000
100 10 1

16. SUNLIGHT !!! Trophic levels Herbivores (Cows) Producers (grass)
Omnivores or
Carnivores
(Humans)
Herbivores
(Cows)
Producers
(grass)
Secondary Consumers
Primary Consumers
Producers
- Energy
1% energy available
10% energy available
100% energy available
- 10 %
- Energy
- 10 %
- Energy
SUNLIGHT !!!

17. Please complete the Food Web Worksheet Part A
Do now activity
Please complete the Food Web Worksheet Part A

18. Please complete the Food Web Worksheet Part B
Do now activity
Please complete the Food Web Worksheet Part B

19. Please complete the Food Web Worksheet Part C
Do now activity
Please complete the Food Web Worksheet Part C

20. Food web project due next Wednesday