Name: FOOD CHAINS/WEBS Period:

Name:
Period:
FOOD CHAINS/WEBS
1. The ecosystem drawn above contains a community of organisms living in a nonliving environment.
Identify the following parts: (total 12 points)
a. Source of energy (1) ___________________________________________________________
b. Producers (4) _________________________________________________________________
c. Consumers (9) ________________________________________________________________
______________________________________________________________________________
d. Decomposers (2) ______________________________________________________________
e. Nonliving environment (8) _______________________________________________________
______________________________________________________________________________
2. Give two examples of food chains in the above environment (include at least three organisms). (2 pts)
a. ____________________________________________________________________________
b. ____________________________________________________________________________
3. Using three different colored pencils, identify three food chains in the above illustration by
drawing arrows connecting the organisms. (3 points)
4. How does a food chain differ from a food web? ______________________________________
______________________________________________________________________________
5. Here are two food chains that occur in nature:
a. corn
b. one-celled algae
mice
hawk
water fleas
minnows
frogs
List your own producers and consumers in a food pyramid for each food chain in the pyramids below.
a. (3 points)
b. (8 points)
6. Where is most of the energy located in a pyramid? _______________________________________
7. Why is energy lost at each level of the pyramid? _________________________________________
__________________________________________________________________________________
8. How do energy and nutrients move from producer to consumer levels? ________________________
__________________________________________________________________________________
Refer to the illustration drawn below to answer the following questions:
9. What are the herbivores in the pyramid? _______________________________________________
10. What are the carnivores in the pyramid? _______________________________________________
11. What is biomass? _________________________________________________________________
12. What is the biomass in kilograms of the producers? _______________________________________
13. What is the total biomass in kilograms of all the consumers? ________________________________
14. Between what two levels is there the greatest loss in biomass? ______________________________