1. Aim How does energy flow through a food web?

2. Do Now 1. Answer the Do Now question 2. Look over handed back work

3. Food Chain
_______________  ________________  ____________________  _______________

4. Food Chain Grass  Rabbit  Snake Bear
Autotroph Herbivore Omnivore Carnivore
Producer Primary Consumer Secondary Consumer Tertiary Consumer

5. First level of pyramid Producers
Producer level contains the most energy

6. Next levels of pyramid
After the producer level, all subsequent levels are:
Consumers

7. Energy pyramid
1. A diagram showing the relative amount of energy contained in each level of a food chain or web

8. Why less energy?
2. Energy is lost to the environment 3. Energy is used up by each organism for everyday life processes

9. Energy passed to each level
Only about 10% of energy is passed from one level to the next level

10. Food web to energy pyramid
Trees and Grass
Hawk
Snake, owl, hawk
Cricket, mouse, deer
Many food chains

11. Brain Pop http://www.brainpop.com/science/energy/energypyramid/
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12. Base your answer on the diagram and on your knowledge of biology
Base your answer on the diagram and on your knowledge of biology. Which level of consumers contains the largest percentage of total stored energy?
level A
level B
level C
level D

13. Base your answer on the diagram and on your knowledge of biology
Base your answer on the diagram and on your knowledge of biology. Which organism is a primary consumer?
alga
crustacean
sunfish
great blue heron

14. The diagram shows nutritional relationships between organisms of various populations in a food web. Which organisms are classified as secondary consumers?
hawk, grasshopper, and mouse
rabbit, mouse, and snake
grasshopper, frog, and rabbit
snake, hawk, and frog

15. The role of an organism within a community is known as its
1.niche
2.habitat
3.biome
4.succession